Sexual development, size at maturity, size at maternity and fecundity of the blue shark Prionace glauca (Linnaeus, 1758) in the Southwest Atlantic

Montealegre‐Quijano, S.; Cardoso, Andrei Tiego Cunha; Silva, Renato Z.; Kinas, Paul Gerhard; Vooren, Carolus Maria

doi:10.1016/j.fishres.2014.03.003

Cited by 23 publications

(19 citation statements)

References 28 publications

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“…In the North-west Atlantic, the size at 50% sexual maturity for male blue sharks averages 180 cm FL, and females are fully mature by 185 cm FL (Pratt 1979). Similarly, Montealegre-Quijano et al (2014) found the size at 50% maturity of blue sharks in the South-west Atlantic to be 171 and 180 cm FL for females and males, respectively. Longevity of blue sharks is estimated at ,20-26 years (Skomal and Natanson 2003) with a maximum size of 383 cm TL (320 cm FL) reported from the North-west Atlantic Ocean (Bigelow and Schroeder 1953).…”

Section: Introductionmentioning

confidence: 86%

Age validation of the blue shark (Prionace glauca) in the eastern Pacific Ocean

Wells

Spear

Kohin

2017

Mar. Freshwater Res.

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The blue shark (Prionace glauca) is subjected to high levels of fishery catch and by-catch worldwide; thus, knowledge of their productivity and population status is vital, yet basic assumptions of band-pair deposition rates in vertebrae used for age and growth models are being made without direct validation studies in the Pacific Ocean. As such, the purpose of the present study was to validate vertebral band-deposition rates of blue sharks tagged and recaptured in the eastern Pacific Ocean. Vertebrae of 26 blue sharks marked with oxytetracycline (OTC) were obtained from tag–recapture activities to determine timing of centrum growth-band deposition. Results from band counts distal to the OTC mark on each vertebra indicated that a single band pair (1 translucent and 1 opaque) is formed per year for blue sharks ranging from 1 to 8 years of age. Length–frequency modal analysis was also used to obtain growth estimates from a dataset spanning 26 years of research and commercial catch data. Results provide support for annual band-pair deposition in blue shark vertebrae and will aid in future blue shark age and growth studies in the Pacific Ocean.

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Section: Introductionmentioning

confidence: 86%

Age validation of the blue shark (Prionace glauca) in the eastern Pacific Ocean

Wells

Spear

Kohin

2017

Mar. Freshwater Res.

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“…Life‐history traits are useful for informing fishery managers and conservation biologists about the capacity of a stock to withstand a given exploitation scenario (Hoenig & Gruber, ; Montealegre‐Quijano et al, ; Pardo et al, ). These data are especially relevant for elasmobranchs, which are known to be less resilient to increases in mortality rates and thus, more vulnerable to overfishing (Dulvy et al, ; Kindsvater et al, ).…”

Section: Morphometry and Incubation Period Of Each Newborn Of Diturusmentioning

confidence: 99%

First observations on captive hatching and incubation period of the yellow‐nose skateDipturus chilensis(Rajiformes: Rajidae), from the South‐Eastern Pacific Ocean

Concha

Morales

Hernández

2018

Journal of Fish Biology

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“…Species may also differ considerably between locations in terms of growth rate (Tanaka et al, 1990;Lessa et al, 2004;Harry et al, 2013;Gutteridge et al, 2013;Meyer et al, 2014), longevity (Wintner and Dudley, 2000;Allen and Wintner, 2002;Geraghty et al, 2014), size-at-maturity (Parsons, 1993;Frisk et al, 2001;Francis and Duffy, 2005;Semba et al, 2011;Montealegre-Quijano et al, 2014) and maximum size (Pratt and Casey, 1990;Cortés, 2000;Allen and Wintner, 2002;Carlson and Baremore, 2005;Neer et al, 2005;Meyer et al, 2014), which suggests that age and growth assessments may be of value in the understanding of individual populations of target species.…”

Section: Life History Trait S O F Elasmobranchsmentioning

confidence: 99%

The biology and ecology of the tiger shark (Galeocerdo cuvier) on the east coast of Australia

Holmes¹

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The tiger shark (Galeocerdo cuvier) (Péron and Lesueur 1822) is the largest of the carcharhinids, with a circumglobal distribution in both tropical and warm temperate coastal and pelagic waters. In the western Pacific, G. cuvier movements are wide-ranging, encompassing the east coast of Australia and south Pacific Islands.Throughout the region, G. cuvier is exposed to a range of commercial, recreational, artisanal and illegal foreign fishery impacts, as both a target and by-product species.Listed as 'near threatened' on the International Union for Conservation of Nature (IUCN) Red List, suitable long term species-specific catch, catch rate and biological data are seldom available for large shark species like G. cuvier, particularly where historical commercial fishery logbook reporting has been poor.Shark control programs targeting large sharks along Australia's east coast have been in operation for over 60 years, using relatively standardised fishing gear in nearshore waters all year round, with historical catch and effort data recorded by shark contractors. Historical catch, catch rate and biological data collected through the Queensland Shark Control Program (QSCP) since 1993 were investigated, which revealed significant declines (p < 0.05) in catch rates of G. cuvier at some tropical and all sub-tropical locations along the Queensland coast. Significant temporal declines in the average size of G. cuvier also occurred at four of the nine locations analysed (p < 0.05), which could be indicative of fishing reducing abundance in these areas. Interannual variability in catches at each location was considerable and warranted careful interpretation with respect to estimating population abundance from these data.Investigation into the spatial and temporal movements of tiger sharks, and how their abundances fluctuate in relation to environmental influences, provided a basis for determining the factors driving this variability.Tiger shark movements were recorded using PAT Mk-10 and SPOT5 electronic tags to investigate G. cuvier spatial dynamics, site fidelity and habitat use off the east coast of Australia. Of the 18 tags deployed, 15 recorded information on depth and/or temperature, and horizontal movements, with tracking times ranging between four and 408 days. Horizontal movements were characterised by combinations of resident and transient behaviour that coincided with seasonal changes in water temperature, with summer migrations from sub-tropical Queensland waters to the southern temperate iii waters of New South Wales (NSW) to exploit the seasonally warm and prey abundant waters. While the majority of movement activity was focused around the continental slope, large-scale migration was evident with one individual moving from offshore Sydney, Australia, to New Caledonia (≈ 1800 km) in 48 days. Periods of tiger shark residency outside of Australia's fisheries management zones highlighted the potential vulnerability of the species to unregulated fisheries, and the importance of crossjurisdictional arrangemen...

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Sexual development, size at maturity, size at maternity and fecundity of the blue shark Prionace glauca (Linnaeus, 1758) in the Southwest Atlantic

Cited by 23 publications

References 28 publications

Age validation of the blue shark (Prionace glauca) in the eastern Pacific Ocean

Age validation of the blue shark (Prionace glauca) in the eastern Pacific Ocean

First observations on captive hatching and incubation period of the yellow‐nose skateDipturus chilensis(Rajiformes: Rajidae), from the South‐Eastern Pacific Ocean

The biology and ecology of the tiger shark (Galeocerdo cuvier) on the east coast of Australia

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