Age, Growth, and Reproduction of the Pelagic Thresher Shark, Alopias pelagicus in the Northwestern Pacific

Liu, Kwang‐Ming; Chen, Che‐Tsung; Liao, Tai-Hsiang; Joung, Shoou‐Jeng

doi:10.2307/1447386

Cited by 97 publications

(150 citation statements)

References 7 publications

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“…missing the head and tail) pelagic threshers and for the largest bigeye thresher (which was not weighed), morphometric parameters were estimated using established fork length (FL) to total length (TL) and TL vs body mass regressions. Pelagic thresher alternate-length (insertion of first dorsal to insertion of second dorsal) was converted to TL using data from the California Drift Gillnet Fishery database (D. Holts, National Marine Fisheries Service, unpublished), and TL-body mass relationships were determined using regressions from Liu et al (1999). The body mass of the A. superciliosus specimen was determined using data from Kohler et al (1995).…”

Section: Body Sizementioning

confidence: 99%

“…While all three thresher species, at times, occupy similar depths and habitats (Hanan et al, 1993); latitudinal and depthdistribution data suggest that A. vulpinus, with its warm RM, and A. superciliosus, which is probably a cranial endotherm (Weng and Block, 2004), inhabit cooler waters than A. pelagicus, a species predominantly found in tropical and subtropical waters (Compagno, 1998;Liu et al, 1999). A. vulpinus has been shown to have the greatest overall latitudinal distribution, ranging in the eastern Pacific from 58°N to 55°S (Compagno, 2001).…”

Section: Regional Endothermy and Thresher Shark Natural Historymentioning

confidence: 99%

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The red muscle morphology of the thresher sharks (family Alopiidae)

Sepúlveda

Wegner

Bernal

et al. 2005

Journal of Experimental Biology

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SUMMARY A more medial and anterior position of the red aerobic myotomal muscle (RM)and the presence of a vascular counter-current heat exchange system provide the functional elements that facilitate regional RM endothermy in tunas,lamnid sharks and the common thresher shark (Alopias vulpinus). The convergent RM morphology among all species capable of RM endothermy suggests that RM position is a strong predictor of fish endothermic capacity. The present study investigated the comparative RM morphology of the other two thresher shark species (bigeye thresher, Alopias superciliosus, and the pelagic thresher, Alopias pelagicus), for which there is no information regarding their capacity for RM endothermy, and compared these data with published works on A. vulpinus. The digitization of transverse sections along the body of A. superciliosus and A. pelagicus enabled quantification of the relative amount of RM and the position and placement of the RM along the body. The RM in both A. superciliosus and A. pelagicus is positioned subcutaneously,along the lateral edges of the myotomes, and is distributed relatively evenly over the trunk of the body. The position of maximum RM area is at 50% fork length (FL) for A. superciliosus and at 75% FL for A. pelagicus. The amount of RM (mean ± s.e.m.) is 2.31±0.11% and 3.01±0.10% in A. superciliosus and A. pelagicus, respectively. When compared with A. vulpinus,all three alopiid sharks have a similar amount of RM. However, A. superciliosus and A. pelagicus differ from A. vulpinusin that they do not possess the medial and anterior RM arrangement that would likely facilitate metabolic heat conservation (RM endothermy).

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Section: Body Sizementioning

confidence: 99%

Section: Regional Endothermy and Thresher Shark Natural Historymentioning

confidence: 99%

The red muscle morphology of the thresher sharks (family Alopiidae)

Sepúlveda

Wegner

Bernal

et al. 2005

Journal of Experimental Biology

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“…Males reach adult at size about 240-250 cm and females at 260-285 cm (White et al, 2006;White, 2007). Liu et al (1999) reported that the total length at maturity was 282-292 cm for females and 267-276 cm for males. Based on the results of this study, it can be concluded that the majority A. pelagicus caught from the Indian Ocean on 2002-2007 are commonly as adult stage (mature non reproductive or mature sexually).…”

Section: Discussionmentioning

confidence: 99%

Catch Composition and Some Biological Aspects of Sharks in Western Sumatera Waters of Indonesia

Dharmadi¹,

Mahiswara

Kasim³

2017

Indonesian Fisheries Research Journal

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ABTRACTThis study was conducted in western Sumatera and since October 2013 to June 2014. The sampling locations in Banda Aceh and Sibolga-North Sumatera which were the largest base of fisheries in western Sumatera region. Shark landing recorded by enumerators was used as sampling data daily. This research aim to describ sex ratio, size composition, catch composition of sharks, and length at first maturity. In Banda Aceh, the sharks as target fish collected by sorting the bycatch from tuna longlines and tuna handlines. In Sibolga, sharks is bycatch from fish net, bottom gillnet and purse seine. Overall, there were 20 species of shark caught in west Indian Ocean and landed at those fish landing sites, dominated by Spot tail shark (23%) and Silky shark (13%), whereas Hammerhead shark contributed about 10% and Oceanic whitetip shark was only less than 1%. Almost of Spot tail shark, Silky shark, and Scalloped hammerhead that caught in that area were immature, while for the almost part of Tiger shark and Pelagic thresher were matured. The sex ratios for Spot tail shark, Silky shark, Tiger shark, Pelagic thresher, and Scalloped hammerhead caught and landed at Lampulo and Sibolga fish landing sites were not balance. The length at first maturity for Spot tail shark was Lm=87,1 cm and Lm = 213,2 cm total length for Tiger shark.

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“…) showing late sexual maturity (8.0-9.2 years for females and 7.0 -8.0 years for males) and usually producing about two embryos per litter (Liu et al, 1999).…”

mentioning

confidence: 99%