12 nov. 2012 - Ariz J, Delgado de Molina A, Ramos ML, Santana JC (2006) Check list and catch rate data by hook type and bait for bycatch species caught by ...
Status of the Indian Ocean Shortfin Mako Shark (SMA) (Isurus oxyrinchus) TABLE 1. Shortfin mako shark: Status of shortfin mako shark (Isurus oxyrinchus) in the Indian Ocean Area1
Indian Ocean
2012 stock status determination
Indicators Reported catch 2011: Not elsewhere included (nei) sharks: Average reported catch 2007–2011: Not elsewhere included (nei) sharks: MSY: F2011/FMSY: SB2011/SBMSY: SB2011/SB0:
1,361 t 55,135 t 1,207 t 63,783 t unknown unknown unknown unknown
Uncertain
1
Boundaries for the Indian Ocean = IOTC area of competence Stock overfished(SByear/SBMSY< 1) Colour key Stock subject to overfishing(F year/FMSY> 1) Stock not subject to overfishing (F year/FMSY≤ 1) Not assessed/Uncertain
Stock not overfished (SByear/SBMSY≥ 1)
TAB LE 2. Shortfin mako shark: IUCN threat status of shortfin mako shark (Isurus oxyrinchus) in the Indian Ocean IUCN threat status1 Common name Scientific name Global WIO EIO status – – Shortfin mako shark Isurus oxyrinchus Vulnerable IUCN = International Union for Conservation of Nature; WIO = Western Indian Ocean; EIO = Eastern Indian Ocean SOURCES: IUCN 2007, Cailliet 2009
INDIAN OCEAN STOCK – MANAGEMENT ADVICE Stock status. There remains considerable uncertainty about the relationship between abundance and the standardised CPUE series from the Japanese longline fleet, and about the total catches over the past decade (Table 1). The current IUCN threat status of ‘Vulnerable’ applies to shortfin mako sharks globally (Table 2). Trends in the Japanese CPUE series suggest that the longline vulnerable biomass has declined from 1994 to 2003, and has been increasing since then. There is a paucity of information available on this species and this situation is not expected to improve in the short to medium term. There is no quantitative stock assessment or basic fishery indicators currently available for shortfin mako shark in the Indian Ocean therefore the stock status is highly uncertain. Shortfin mako sharks are commonly taken by a range of fisheries in the Indian Ocean. Because of their life history characteristics – they are relatively long lived (over 30 years), females mature at 18–21 years, and have relativity few offspring (
12 nov. 2012 - in the western South Pacific. In the western South Indian Ocean maturity was estimated at about 270 m TL for females and. 190-210 m TL for ...
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