共查询到20条相似文献，搜索用时 220 毫秒
1.
A double-tagging experiment is presented that estimates tag retention by plastic dart and T-bar anchor tags in a wild population of Clarias gariepinus. It is shown that plastic dart tags are the most suitable tag as there was 100% initial retention and long-term loss of 2% per annum. T-bar anchor tags had an initial tag retention rate of 81% and no measurable long-term loss. A combination of tag design is attributed to the poor performance of T-bar anchor tags as the T-piece of the tag does not properly anchor behind the pterygiophores. 相似文献
2.
G. Knaepkens E. Maerten C. Tudorache G. De Boeck M. Eens 《Ecology of Freshwater Fish》2007,16(3):404-409
Abstract – This study examined potential adverse effects of surgically implanted passive integrated transponder (PIT) tags (12 × 2.1 mm) on bullhead ( Cottus gobio L.) of three different length-classes (I: 50–64 mm, II: 65–79 mm, III: 80–94 mm). During a 7-week laboratory experiment, the rate of PIT tag loss, incision closure time, survival, growth and swimming capacity were tested. The PIT tag weight to fish body weight ratio varied between 1.04% and 4.85%. The mean incision closure time differed significantly among length-classes and varied between 2.8 (I) and 4.3 (III) weeks. Nevertheless, PIT tag retention did not differ among length-classes and was ≥90%. The survival of untagged, sham-tagged and PIT-tagged bullheads was ≥90% and did not differ within or among length-classes. Finally, within each length-class, there was no difference in growth and swimming capacity among treatments. Hence, these results suggest the applicability of PIT tags for individually tagging bullheads ≥50 mm. 相似文献
3.
The suitability of VIE tags to assess stock enhancement success in juvenile European lobsters (Homarus gammarus) 
下载免费PDF全文
下载免费PDF全文 Sarah T V Neenan David J Hodgson Tom Tregenza Dominic Boothroyd Charlie D Ellis 《Aquaculture Research》2015,46(12):2913-2923
Assessments of stock enhancement programmes for European lobsters (Homarus gammarus) require mark‐recapture analysis of stocked individuals. However, established tag technology is deemed unsuitable for extensive use by many current lobster hatcheries, particularly upon the early juvenile stages. We tested the suitability of fluorescent Visible Implant Elastomer (VIE) tags for use in 5‐month‐old juvenile lobsters. Three treatment groups comprising 348 cultured lobsters in total were used to examine survival, growth and tag retention, and to assess mobility, shelter use and moulting behaviours. Tagging had no significant effect on lobster survival, growth, mobility, shelter use or moult frequency. Survival over 7 weeks was 75% among lobsters tagged with two elastomers, 76% in those with one elastomer and 74% among untagged controls. Mortality during moulting did not increase in tagged (6%) compared to untagged lobsters (9%). We found no evidence that VIE tags cause any negative effects that would be expected to inhibit survival upon wild release, but tag loss had reached 12% in both tagged treatments after 7 weeks and showed no sign of abating. Our study suggests that VIEs effectiveness in discerning cultured lobsters long after wild release may be limited when used in smaller juveniles. 相似文献
4.
We tagged fingerling white bass, Morone chrysops, with passive integrated transponders (PIT) at two body locations (peritoneal cavity and dorsal musculature) and six weight classes to evaluate survival, tag retention, and weight gain during a 28-day experimental period. The probability of survival (as calculated by logistic regression) was >95% for fingerlings >19 g for both PC and DM. Retention of PIT tags varied between PC and DM tagged white bass in 6 g and 14 g fingerlings. The probability of tag retention was 100% in all sizes of fingerlings tagged PC, and >95% for fish >19 g tagged DM. 相似文献
5.
Abstract – The round goby ( Neogobius melanostomus Pallas) is an invasive species in North America and Europe. We evaluated the efficacy of passive integrated transponder (PIT) tags for marking round gobies and tracking their movements with a portable underwater antenna in shallow areas (≤1 m) of a lake. Tagging did not markedly decrease growth of fish <105 mm; however, growth decreased unexpectedly for tagged fish ≥105 mm during the final sampling period. Nevertheless, tagging did not increase mortality regardless of size class, and tag retention was 100% for caged fish. Tagged round gobies in a 20 × 20-m2 block net avoided detection by the portable underwater antenna, and a high proportion of fish probably escaped from the net, suggesting that round gobies may be more mobile than previously reported. In conclusion, PIT tags are a viable method for individually marking round gobies, but detecting tagged round gobies with a portable underwater antenna, given current technology, does not appear promising in shallow areas with low habitat complexity. 相似文献
6.
为了探明适宜大渡河安谷水电站流域增殖放流鱼类标志的方法,在安谷水电站鱼类增殖放流站使用T-tag锚标法(T-tag)、金属线码标法(CWT)和荧光胶体标记法(VIE)分别对四种放流鱼苗(胭脂鱼Myxocyprinus asiaticus、长薄鳅Leptobotia elongate、唇■Hemibarbus labeo和黄颡鱼Pelteobagrus fulvidraco)进行标记。每种鱼苗选择大、小两种规格进行试验。在标记后40 d分别统计了鱼苗的存活率、标记保持率和生长等数据。结果表明:(1)40 d短期标记条件下,CWT和VIE对四种鱼苗的存活率负面影响较小,T-tag对存活率负面影响较大。其中,CWT和VIE对体长50～110 mm小规格放流鱼苗的存活无显著影响,而T-tag导致小规格放流鱼苗存活率显著下降;(2)四种放流鱼苗CWT和VIE标记保持率均显著高于T-tag,其中,除50～80 mm的小规格长薄鳅VIE组标记保持率略低于CWT外,其它各实验组均表现出VIE组大于CWT组;(3)CWT和T-tag标记保持率与标记鱼类生活习性相关性较大,胭脂鱼、长薄鳅标记保持率相对高于唇■、黄颡鱼;(4)三种标记对鱼苗都具有一定的损伤,但与对照组相比标记组存活的鱼苗生长状况均不受影响,其中,四种鱼苗相比唇■的生长速度最快。(5)考虑到T-tag标记具备操作简单、标记快、易辨认等特点,建议使用T-tag标记时鱼苗的全长应大于170 mm。 相似文献
7.
Effects of tagging on migration behaviour,survival and growth of hatchery‐reared Atlantic salmon smolts 下载免费PDF全文
下载免费PDF全文 R. Huusko A. Huusko A. Mäki‐Petäys P. Orell J. Erkinaro 《Fisheries Management and Ecology》2016,23(5):367-375
The effects of four different tagging methods (PIT, anchor T‐tag, Carlin tag and dummy radio transmitter) on survival, behaviour and growth of Atlantic salmon smolts during their downstream migration were examined in semi‐natural circular channels during a natural migration period in spring. Survival of smolts was high and tagging wounds healed well in all tagging groups. Tag loss rates were generally low, being the highest (2.5%) in the dummy radio transmitter group. Total length and body mass of the tagged and untagged smolts did not differ at the end of the experiment. Migration activity of smolts generally showed similar patterns among the treatments. However, Carlin‐tagged smolts started their migration slightly later than the PIT‐tagged fish, and smolts tagged with Carlin tag or dummy radio transmitter showed less overall migration activity than fish with PIT tag. 相似文献
8.
Microtagging is an adequate method of ensuring correct recapture estimates in enhancement of natural lobster, Homarus gammarus (L.), stocks through releases of cultured juveniles. This paper compares three lobster size categories (8-10, 12-14 and 16-18 mm), two tag lengths (0.5 and 1.0 mm), and two methods of holding the animal during marking with respect to tag retention and survival. A total of 1721 individuals were used in the experiment. The results did not reveal any obvious trends in tag retention related to either different tag lengths or different lobster sizes. Lobster held laterally during tagging showed higher tag retention (94-99%) than lobsters held with the ventral side uppermost (74-97%). Examination, using X-ray, of 81 juveniles which had tested negative for the presence of tag by the magnetic sensing device, showed that four of these in fact had tags. This suggests that the true tag retention figure could be higher than shown in the results. The cumulative mortality ranged from 0 to 4.7% after 3 days, but only for the smallest animals marked with 1 -mm tags laterally: this was significantly higher than in the control group. After 20 days, the cumulative mortality ranged from 0 to 5.7%. but there were no significant differences between experimental and control groups. 相似文献
9.
To monitor the success of stockings of hatchery-reared barramundi, Lates calcarifer (Bloch), in tropical Australian waters a series of laboratory and field experiments were undertaken to evaluate a range of marking techniques. Juvenile fish of stocking size 30-85 mm total length were first used in laboratory experiments and then some were stocked into a freshwater impoundment for field evaluation. Marking techniques evaluated were fin crimping, fin removal, cold branding, polyethylene streamer (ags and coded-wire tags. The results showed that dorsal fin crimping and pelvic fin removal were relatively ineffective methods of marking, with only 53% and 63% of marks in each respective group being recognizable after 3 months. The polyethylene streamer tags were quickly shed, with 100% loss after only 77 days. Cold brands faded rapidly and were not considered to be of value as long-term marks. Coded-wire tags, inserted into the cheek musculature, were considered to be the most successful of the techniques assessed. Coded-wire tags were implanted at a rate of 250-270 tags per hour with an immediate success rate of 95-97%. These tags had no significant detrimental effect on either growth or survival and tag retention in the 2-month laboratory trials was 93%. Longer-term field studies, where fish had been stocked for about a year, also suggested little effect of coded-wire tags on growth or survival and no evidence of shedding. 相似文献
10.
Abstract A hatchery experiment was organised to find out if the high loss rate of coded wire tags, noticed in connection with an Arctic charr Salvelinus alpinus (L.) restocking programme, was size-dependent and also to test head moulds for future taggings. Six moulds made by Northwest Marine Technology Inc. and five moulds made at the Finnish Game and Fisheries Research Institute were used. A total of 100 charr were tagged with standard-length coded wire tags using each mould. One-summer old charr at tagging were held for 534 days and two-summer old charr for 320 days. The tag loss rate varied between 0% and 54% and was negatively related to the size of the charr at tagging. The high loss rate was connected with the poor alignment of some moulds, such that a large proportion of the tags were located in the nasal cavity instead of the nasal cartilage. Testing of the moulds and careful grading of the fish for tagging is emphasised, especially if Arctic charr smaller than 20 g in weight are to be tagged. 相似文献
11.
The suitability of visible implant alphanumeric (VI-alpha) and passive integrated transponder (PIT)-tagging to individually identify seahorses (Hippocampus abdominalis) was assessed in two trials. For each trial, 24 seahorses were tagged and mortality, growth, tag retention and tag visibility/readability assessed, together with 24 control seahorses, over a period of 3 months. For VI-alpha tagging, a single tag was inserted under the skin between the first two anterior lateral tail rings of the seahorses. There was no difference in final seahorse length, wet weight, or mean SGR in tagged seahorses, compared with control seahorses, after 3 months. Tag retention was 100%, as was survival, in both treatments. Tag detection with the naked eye was generally poor but improved using LED blue light. However, readability of tag codes was highly variable and insufficiently reliable for VI-alpha to be suitable for identification of individual seahorses. In PIT-tagged seahorses, a single FDX-B transponder was inserted into the abdominal cavity of seahorses. There was also no difference in final seahorse length, wet weight, or mean SGR, compared with control seahorses, after 3 months. Tag retention was also 100%, as was survival in both treatments. Readability of transponders was reliable and quick using a compact reader. PIT-tagging is considered suitable for individual identification of large H. abdominalis. 相似文献
12.
Abstract – To address the dearth of information on tagging effects and long-term survivorship of tagged fish in native and introduced species, laboratory and field investigations were undertaken on three non-native fish species (pumpkinseed Lepomis gibbosus ; topmouth gudgeon Pseudorasbora parva ; pikeperch Sander lucioperca ) tagged with coded-wire (CW), passive integrated transponder (PIT), radio (RT) telemetry and/or acoustic tags (AT), with survivorship of native brown trout ( Salmo trutta ) examined in the field. Laboratory results revealed high survivorship following tag attachment/insertion and resumption of feeding within 24–48 h of tagging (all mortalities could be attributed to an unrelated outbreak of fungal infection), with retention rates being high in both pumpkinseed and pikeperch but low in topmouth gudgeon (excluded from field studies). In the field, short-term post-operation survival was high in pikeperch, pumpkinseed and brown trout. In pumpkinseed and trout, 100% of RT fish survived a 24–30 day tracking study, with 60% and 80%, respectively, recaptured alive at least 3 months post-tagging. Of PIT tagged pumpkinseed, 44% were recaptured (after 6–18 months), with small-sized, CW-tagged fish (0.38 g weight) captured up to 1 year after tagging. In pikeperch, all AT fish except one (the smallest specimen) survived their full expected tracking period (i.e. tag life) – the single lost specimen survived at least half of its expected tracking period (i.e. 6 month battery life). Overall, the tagging methods used were highly effective in pumpkinseed and pikeperch, showing good retention and survival, but PIT tagging of topmouth gudgeon was plagued by low survivorship and tag rejection. 相似文献
13.
An important requirement of many breeding programmes for aquaculture species is the ability to identify organisms individually or at least by family. While a variety of external and internal tagging methods have been developed that can provide efficient identifications systems, most have specific drawbacks. The present study assessed the efficiency of an internal tagging method that can be applied to family selection programmes in crustacean species. Experiments were conducted to test the efficacy of applying visible implant elastomer (VIE) tags to juvenile giant freshwater prawn (GFP). The first experiment assessed performance of VIE tags in juvenile GFP of different size classes and stability of tags placed in different positions in the abdomen with different numbers of tags implanted. The second experiment applied VIE tags in a long term, large scale, field‐based farming experiment. The third experiment tested the reliability of the system. Results showed that juvenile GFP at 2 g were of suitable size for VIE tags with no negative effects evidence on growth and survival. Tag retention rates were above 97.8% in all experiments and tag readability rates were 100% with a correct assignment rate of 95% through to mature animal size of up to 170 g. 相似文献
14.
Anton T. Ibbotson William D. Riley William R.C. Beaumont Alastair C. Cook Mark J. Ives Adrian C. Pinder Luke J. Scott 《Ecology of Freshwater Fish》2013,22(1):73-81
Over 3 years, 32,444 age‐0 group Atlantic salmon (Salmo salar) parr tagged with passive integrated transponder tags throughout the River Frome catchment were assigned to one of three groups, nonmigrants, autumn migrants and spring smolts, depending on the detection and the timing of detection at downstream tag readers (situated 8.6 km above the tidal limit). We examined the effect of density at the time of tagging (n·m?2), distance upstream from the tidal limit (km), fish length (mm), Fulton condition index, habitat type (divided into two types, main river and carrier), days after 1 September that each fish was tagged and year (replication) on the proportions of fish in each of the migration groups. Distance upstream from tidal limit was strongly negatively related to the proportion of autumn migrants and positively related to the proportion of spring smolts. Nonmigrants had a lower average body size than migrants, although there were no differences in the sizes of autumn migrants and spring smolts in September prior to migration. Fish density had no effect on migration strategy. A lower proportion of fish migrated as autumn migrants from the smaller carrier habitats than the main river channel. There is some evidence that those parr destined to become autumn migrants underwent a lower mortality rate during September before tagging than those destined to become spring migrants indicating possible physiological or behavioural differences between these two groups of fish at that time. More research into the factors responsible for initiating the autumn migration is required. 相似文献
15.
Abstract. The adaptation of proprietary fish-tagging equipment for tagging small lobsters, Homarus gammarus (L.) (9–15mm carapace length), with internal microware tags is described. Tag retention was 85–100% as the animals grew through up to 22–29 moults (90–102mm carapace length) in captivity. Claw loss during handling was reduced from 4% lo less than 1% at a tagging rate of 240 lobsters per has experience was gained. 相似文献
16.
Takumi Fujino Hideki Sawada Hiromichi Mitamura Reiji Masuda Nobuaki Arai Yoh Yamashita 《Fisheries Science》2017,83(3):367-372
Populations of sea cucumbers, including the Japanese common sea cucumber Apostichopus japonicus, have been seriously depleted worldwide due to overfishing. Mark–recapture study is an efficient means of collecting ecological data. However, the use of such a method in sea cucumbers is difficult because they lack hard tissues in the body wall. Here we tested the viability of various tagging methods on A. japonicus. First, we applied conventional tags using four different methods [single spaghetti (T-bar) tagging, double spaghetti tagging, ribbon tagging, and Atkins tagging] to ten individuals per method in aquaria for 14 days. Of the methods used, single spaghetti tagging had the highest retention rate. Then we examined the retention rate of single spaghetti tags on ten individual sea cucumbers for up to approximately 6 months in rearing conditions. The single spaghetti tagging method showed a retention rate of 100% over at least 7 days, and 50% of the tags remained embedded after 56 days. The longest duration of tag retention was 174 days, at which time the experiment was terminated. These results indicate that single spaghetti tagging is reliable for both short- and longer-term studies, making it a useful tool for ecological and conservation studies in sea cucumbers. 相似文献
17.
In tropical fisheries where ageing fish is often difficult, tagging programmes offer an important means to estimate growth parameters and mortality rates. The majority of tags are large and attached externally via a puncture in the muscle. These characteristics may cause significant biological effects which bias parameter estimates. Visible implant (VI) tags offer a more benign means to individually mark fish. The utility of VI tags for marking five species of tropical river fish was examined. The results indicate that the tag and tagging operation had no influence on either growth or mortality, although tag retention was poor compared with other studies. For three of the five species, the only suitable tagging location was highly inconspicuous and therefore inappropriate for tagging programmes that rely upon fishermen to return tagged fish. Alternative tagging locations may improve retention rates and the visibility of the tag. 相似文献
18.
本研究采用注射可视嵌入性荧光、剪附肢两种手段对不同期别的三疣梭子蟹进行标记,以研究标记的适用性及对个体生长的影响。对不同发育阶段三疣梭子蟹进行两个部位荧光注射,统计蜕壳后可识别率。结果显示,Ⅱ、Ⅲ期幼蟹适合腹面区域注射,Ⅳ期以后幼蟹适合游泳足基节和头胸甲背面的薄膜关节注射;标记后,经过两次蜕壳,识别率在80％以上,但经3次蜕壳后,识别率较低;根据标记组、未标记组生长数据,通过单因素方差分析发现,标记对三疣梭子蟹个体生长无显著性影响。Ⅶ期以后的幼蟹,更适合剪附肢法,该法操作简单、识别率高,对个体生长、存活无显著性影响（P〉0．05）。 相似文献
19.
20.
为了开发适宜牙鲆(Paralichthys olivaceus)苗种放流的标志技术,利用编码金属标签(CWT)对不同规格牙鲆苗种进行了标记实验,并从标记死亡率、脱标率、适宜标记鱼规格等方面评价了CWT的标记效果.结果显示,CWT标记3种规格的牙鲆苗种后,脱标均发生在标记后的4d内,其后未再发生脱标现象.小规格苗种[全长为(5.92±0.41)cm]死亡率较高(13％),中规格苗种[全长(8.92±0.36) cm]死亡率为2％,大规格苗种[全长为(12.06士0.62) cm]死亡率为1％.小规格、中规格和大规格苗种脱标率分别为3.3％、2.4％和0.7％.建立了标记死亡率(M)与苗种全长(TL)、体厚度(BT)的关系模型:M=0.7254 TL2-15.3220TL+79.4260 (R2=0.9601);M=1.3627 BT2-15.5610 BT+ 44.4330 (R2=0.9645),为适宜苗种规格选择与标记效果评价提供了依据.今后利用CWT标签进行牙鲆苗种标志放流时,建议选择全长6 cm以上的苗种进行背部肌肉标记,标记对苗种游泳行为和生长无影响,表明CWT是一种适宜在牙鲆大规模标志放流中应用的理想标志方式. 相似文献