Reproductive biology of deep-sea catsharks (Chondrichthyes: Scyliorhinidae) in the eastern North Pacific

Flammang, Brooke E.; Ebert, David A.; Cailliet, Gregor M.

doi:10.1007/s10641-006-9162-9

Cited by 26 publications

(29 citation statements)

References 25 publications

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“…Other authors have found a lack of seasonal reproductive pattern in deep water squalid sharks, including C. fabricii and E. princeps in Iceland (Jakobsdottir, 2001) and Etmopterus granulosus in New Zealand (Wetherbee, 1996). On the other hand, Flammang et al (2006) found seasonal reproductive patterns in several oviparous deep water Scyliorhinidae sharks, based on gonadosomatic indices variations throughout the year.…”

Section: Discussionmentioning

confidence: 93%

Population parameters of the smooth lantern shark, Etmopterus pusillus, in southern Portugal (NE Atlantic)

Coelho

Erzini

2007

Fisheries Research

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Section: Discussionmentioning

confidence: 93%

Population parameters of the smooth lantern shark, Etmopterus pusillus, in southern Portugal (NE Atlantic)

Coelho

Erzini

2007

Fisheries Research

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“…RatWsh from the eastern PaciWc Ocean have a 6-to 8-month period of parturition from »May through October (Barnett et al 2009). On the outer coast, aggregations of ratWsh egg cases have been observed on the shelf break, sometimes in large sand wave formations in areas of high current (Barnett 2008), which may help aerate egg cases (Flammang 2005). Thus, ratWsh may make movements to suitable habitats during parturition, but we did not Wnd any monthly or seasonal trends in movement to support this hypothesis; however, our sample size limited these Wner-scale temporal analyses.…”

Section: Geographic Patterns Of Movementmentioning

confidence: 89%

Combining fishing and acoustic monitoring data to evaluate the distribution and movements of spotted ratfish Hydrolagus colliei

Andrews

Quinn

2011

Mar Biol

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Direct and indirect methods have been used to describe patterns of movement of Wshes, but few studies have compared these methods simultaneously. We used 20 years of trawl survey data and 1 year of acoustic telemetry data to evaluate the vertical and horizontal movement patterns of spotted ratWsh Hydrolagus colliei in Puget Sound, WA, USA. Densities of large ratWsh (¸30 cm) were higher at the deepest depths trawled (70 m) during daylight hours, whereas densities were similar across depth zones (to 10 m) at night. Acoustic tracking of ratWsh showed distinct diel patterns of movement and activity level; ratWsh moved into shallow, nearshore habitats at night from deeper, oVshore habitats during the day and made »3 times more moves at night than day in shallow habitats. Broader spatial patterns depended on where ratWsh were tagged: one tag group remained in one general location with few excursions, whereas a second tag group moved within a 20-km band with some individuals moving >90 km. These data will help inform food web models' abilities to quantify interspeciWc interactions between ratWsh and other components of their community.

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“…Distinct seasonal peaks have been shown for G. melastomus off southern Portugal (Costa et al, 2005) and brown catshark Apristurus brunneus (Gilbert, 1892) in the eastern North Pacific (Cross, 1988;Flammang et al, 2008). Although egg-laying took place throughout the year by C. laticeps in southern Australian waters, Awruch et al (2009) observed a peak laying period between January and June.…”

Section: Discussionmentioning

confidence: 99%

Observations on the reproductive biology of three catsharks (Carcharhiniformes: Scyliorhinidae:AsymbolusandFigaro) from the continental shelf of southern Queensland, Australia

Kyne

Courtney²,

Bennett

2010

J. Mar. Biol. Ass.

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Three species of Australian endemic catsharks (grey spotted catshark Asymbolus analis, orange spotted catshark A. rubiginosus and Australian sawtail shark Figaro boardmani) were collected from the trawl grounds of a highly seasonal commercial fishery off southern Queensland, Australia. Specimens were collected on the mid to outer continental shelf at depths between 78 and 168 m. This study provides the first information on the reproductive biology of these three poorly-known species. Mature female and male A. analis were observed from 455 mm total length (TL), mature female A. rubiginosus from 410 mm TL, mature male A. rubiginosus from 405 mm TL, mature female F. boardmani from 402 mm TL and mature male F. boardmani from 398 mm TL (although a lack of immature specimens precluded more accurate assessments of size at maturity). The reproductive mode of all species was confirmed as single oviparous (carrying only one egg case in each uterus at a time). Ovarian fecundity (the number of vitellogenic follicles) ranged from 7-20 in A. analis, 5-23 in A. rubiginosus and 9 -13 in F. boardmani. Several indicators suggest that Asymbolus catsharks off southern Queensland are reproductively active year-round. The proportion of female A. rubiginosus carrying egg cases was highest in spring (60%), intermediate in autumn (50%) and lowest in winter (44%).

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Reproductive biology of deep-sea catsharks (Chondrichthyes: Scyliorhinidae) in the eastern North Pacific

Cited by 26 publications

References 25 publications

Population parameters of the smooth lantern shark, Etmopterus pusillus, in southern Portugal (NE Atlantic)

Population parameters of the smooth lantern shark, Etmopterus pusillus, in southern Portugal (NE Atlantic)

Combining fishing and acoustic monitoring data to evaluate the distribution and movements of spotted ratfish Hydrolagus colliei

Observations on the reproductive biology of three catsharks (Carcharhiniformes: Scyliorhinidae:AsymbolusandFigaro) from the continental shelf of southern Queensland, Australia

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