Geographic Variations in Reproductive Parameters of the Starspotted Dogfish, Mustelus manazo, from Five Localities in Japan and in Taiwan

Yamaguchi, Atsuko; Taniuchi, Toru; Shimizu, Makoto

doi:10.1023/a:1007558324902

Cited by 86 publications

(44 citation statements)

References 14 publications

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“…In elasmobranchs, mating follows peaking of GSI, when the seminal vesicle is filled with spermatozoa; subsequently, GSI decreases (Yamaguchi et al 1997(Yamaguchi et al , 2000Kyne and Bennett 2002). The findings of our study corroborate these data.…”

Section: Discussionsupporting

confidence: 89%

Reproductive biology of the guitarfish Rhinobatos hynnicephalus (Batoidea: Rhinobatidae) in Ariake Bay, Japan

et al. 2009

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Section: Discussionsupporting

confidence: 89%

Reproductive biology of the guitarfish Rhinobatos hynnicephalus (Batoidea: Rhinobatidae) in Ariake Bay, Japan

et al. 2009

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“…As with length at maturity and maximum total length, regional differences have been observed in the reproductive biology of elasmobranchs (Yamaguchi et al 2000). The seasonal, annual cycle observed in the present study differed from that of a northern Australian population of L. macrorhinus.…”

Section: Discussioncontrasting

confidence: 68%

“…Of note is the considerably larger size at birth, size at maturity and maximum TL from the Indonesian population (White 2007). Variations in length at maturity and maximum TL among geographic regions have been reported in sharks and have been linked to differences in water temperature (Menni and Lessa 1998) that correlate to latitude (Yamaguchi et al 2000;Lombardi-Carlson et al 2003). For example, Colonello et al (2007) reported an increased sizeat-maturity with increasing latitude for the angular angel shark, Squatina guggenheim.…”

Section: Discussionmentioning

confidence: 92%

Life-history traits of a small-bodied coastal shark

Gutteridge

Huveneers

Marshall³

et al. 2013

Mar. Freshwater Res.

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Abstract. The life histories of small-bodied coastal sharks, particularly carcharhinids, are generally less conservative than those of large-bodied species. The present study investigated the life history of the small-bodied slit-eye shark, Loxodon macrorhinus, from subtropical Hervey Bay, Queensland, and compared this species' biology to that of other coastal carcharhinids. The best-fit age model provided parameters of L N ¼ 895 mm total length (TL), k ¼ 0.18 and t 0 ¼ À6.3 for females, and L N ¼ 832 mm TL, k ¼ 0.44 and t 0 ¼ À2.6 for males. For sex-combined data, a logistic function provided the best fit, with L N ¼ 842 mm TL, k ¼ 0.41 and a ¼ À2.2. Length and age at which 50% of the population was mature was 680 mm TL and 1.4 years for females, and 733 mm TL and 1.9 years for males. Within Hervey Bay, L. macrorhinus exhibited an annual seasonal reproductive cycle, producing an average litter of 1.9 AE 0.3 s.d. With the exception of the low fecundity and large size-at-birth relative to maximum maternal TL, the life-history traits of L. macrorhinus are comparable to other small-bodied coastal carcharhinids, and its apparent fast growth and early maturation contrasts that of large-bodied carcharhinids.

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“…An increase in the number of embryos with increasing female TL is not uncommon in viviparous elasmobranchs (Lenanton et al 1990;Yamaguchi et al 2000;McAuley et al 2007;Walker 2007). However, this relationship is more difficult to examine in elasmobranchs that lay egg cases over an extended period of time.…”

Section: Female Size and Fecunditymentioning

confidence: 99%

“…Regional differences in size at maturity have been noted for several species of elasmobranchs (Templeman 1987;Yamaguchi et al 2000;Lombardi-Carlson et al 2003). Often in cases where regional comparisons have been described for elasmobranchs, the same authors did not conduct the studies being compared; therefore, differences may be attributed to methodology rather than biology.…”

Section: Introductionmentioning

confidence: 96%

A comparison of reproductive parameters of the Bering skate, Bathyraja interrupta, from two Alaskan large marine ecosystems

Ainsley

Ebert

Cailliet

2011

Mar. Freshwater Res.

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Abstract. Estimates of size at maturity are crucial to fisheries stock assessments and may change spatially and temporally. This study directly compares life-history characteristics of a skate species in two large marine ecosystems in a region where there is both a directed fishery and considerable skate by-catch in other fisheries. The Bering skate, Bathyraja interrupta, is one of the most common skate species in Alaskan waters, occurring in two large marine ecosystems, the eastern Bering Sea (EBS) and the Gulf of Alaska (GOA), but little is known about its life history. Skates were sampled from both regions between 2004 and 2007. In the GOA, the size at maturity was estimated to be 69 cm total length (TL) for males and 71 cm TL for females, while in the EBS size at maturity was estimated as 70 cm and 72 cm TL for males and females, respectively. Median size at maturity differed by sex but not by region. Our results indicate that B. interrupta shows late maturity, typical of most skate species, suggesting that more detailed monitoring of skate populations and precautionary management is warranted as skate fisheries expand.

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Geographic Variations in Reproductive Parameters of the Starspotted Dogfish, Mustelus manazo, from Five Localities in Japan and in Taiwan

Cited by 86 publications

References 14 publications

Reproductive biology of the guitarfish Rhinobatos hynnicephalus (Batoidea: Rhinobatidae) in Ariake Bay, Japan

Reproductive biology of the guitarfish Rhinobatos hynnicephalus (Batoidea: Rhinobatidae) in Ariake Bay, Japan

Life-history traits of a small-bodied coastal shark

A comparison of reproductive parameters of the Bering skate, Bathyraja interrupta, from two Alaskan large marine ecosystems

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