Reproduction and growth of <i>Aphanopus carbo</i>
 and <i>A. intermedius</i>
 (Teleostei: Trichiuridae) in the northeastern Atlantic

Delgado, J. M. P. Q.; Reis, S.; González, Jorge Iván; Isidro, Eduardo; Biscoito, Manuel; Freitas, Mafalda; Tuset, Víctor M.

doi:10.1111/jai.12230

Cited by 10 publications

(19 citation statements)

References 29 publications

(50 reference statements)

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“…Figure 3 represents the growth curves according to sex for all available studies, restricted to the length range of each fish sample. Growth estimates from Vieira et al (2009) and Delgado et al (2013) seem to be in agreement, without any meaningful area effect. Ageat-length from Kelly et al (1998) was consistently higher than in all the other studies.…”

Section: Fisheriesmentioning

confidence: 76%

“…Later, it was determined to be 12 years for Madeira and the Canaries (MoralesNin et al 2002;Pajuelo et al 2008). More recently, the maximum age was estimated to be 12 years in mainland Portugal ) and 14 years in Madeira Delgado et al 2013). Since the length range used in all studies was similar, the differences might be associated with the age assignment criteria, otolith preparation techniques, quality of the equipment used or experience of the readers.…”

Section: Fisheriesmentioning

confidence: 99%

“…26, 333-342 (2013) taken into consideration. The maximum ages assigned by Delgado et al (2013) using whole otoliths were 14 years for black scabbardfish and 15 years for intermediate scabbardfish.…”

Section: Fisheriesmentioning

confidence: 99%

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Black scabbardfish,Aphanopus carbo, in the northeast Atlantic: distribution and hypothetical migratory cycle

Farias

Morales‐Nin

Lorance

et al. 2013

Aquat. Living Resour.

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-The biology, ecology, and dynamics of the deep-sea teleost black scabbardfish in the northeast Atlantic are reviewed. The black scabbardfish is a commercial bathypelagic species found in the NE Atlantic mostly from Iceland to the Canary Islands and Western Sahara, at depths from 800 to 1300 m. The spatial structure of its population is still uncertain, although the existence of one single stock that migrates around the NE Atlantic driven by feeding and reproduction is the most likely hypothesis consistent with available data. This review is based on data from commercial fisheries off the Faroe Islands, Hatton Bank, the west of the British Isles, and Portugal (mainland, Azores, and Madeira) and from Icelandic and Scottish scientific surveys collected between 1988 and 2012. Spawning of black scabbardfish occurs around Madeira and the Canary Archipelagos during the last quarter of the year. According to the migratory hypothesis, eggs, larvae, and possibly juveniles move north to areas from south of Icelandic and Faroe Islands to the west of the British Isles where they remain for some years to feed and grow. Then, they move south to the area off mainland Portugal, where they reach the size of first maturity but do not reproduce, and later move further south to the spawning grounds. Further studies are needed to understand which of the environmental conditions prevailing around Madeira and the Canaries, but not elsewhere, allow this species to mature and subsequently reproduce. This review suggests that a multidisciplinary approach is required to confirm the spatiotemporal migration and habitats used by black scabbardfish populations in the NE Atlantic at different life stages. Otolith contour shape and microchemistry, fatty acids, carbon and nitrogen stable isotopes, as well as steroid hormones are proposed as promising alternative tools for responding to this challenge.

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Section: Fisheriesmentioning

confidence: 76%

Section: Fisheriesmentioning

confidence: 99%

See 1 more Smart Citation

Black scabbardfish,Aphanopus carbo, in the northeast Atlantic: distribution and hypothetical migratory cycle

Farias

Morales‐Nin

Lorance

et al. 2013

Aquat. Living Resour.

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“…There are differences between taxonomic groups, with elasmobranchs being intrinsically more vulnerable to fishing than teleosts, and differences within taxonomic groups, resulting in the more vulnerable teleosts such as orange roughy and roundnose grenadier receiving similar scores to the more productive elasmobranch species Etmopterus spinax. Note that for black scabbardfish, the most conservative life history parameters were selected (Kelly et al 1998) although all other studies suggest shorter longevity and faster growth Pajuelo et al 2008;Vieira et al 2009;Delgado et al 2013). As shown by a metaanalysis on the life history traits of deepwater species (Drazen and Haedrich 2012), the least productive species within each taxonomic group were the ones inhabiting the deeper depth zones.…”

Section: Discussionmentioning

confidence: 99%

Assessing the risk of vulnerable species exposure to deepwater trawl fisheries: the case of orange roughyHoplostethus atlanticusto the west of Ireland and Britain

Dransfeld

Gerritsen

Hareide

et al. 2013

Aquat. Living Resour.

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-With slow growth rates, late maturity and a high maximum age of 100 years or more, orange roughy can be classified as a vulnerable deepwater fish species that can only sustain low rates of exploitation. Historical patterns of exploitation associated with this species suggest that it is currently not possible to manage its fisheries in the Northeast Atlantic sustainably, and the total allowable catch for orange roughy has been gradually reduced to zero for European fisheries since 2010. Orange roughy to the west of Ireland and Britain occurs on distinct bathymetric features (seamounts, hills and canyons) as well as on flat ground along the continental slope. Productivity-susceptibility analysis (PSA) was performed to evaluate the biological vulnerability of orange roughy in relation to other deepwater species and the risk that recent and current fisheries pose to its populations in the study area. Time-dependant PSA, based on the spatial overlap between orange roughy distribution and recent and current deepwater fisheries demonstrated a strong reduction in risk over time when fisheries stopped directed targeting practices and continued with mixed deepwater trawl fisheries. Some spatial overlap between the species and current fisheries remains, and while the method can show relative risk reduction, it cannot provide information on whether the risk is low enough to allow the recovery of depleted populations.

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“…These fisheries continued intermittently after that date in the seamounts in international waters ). Nowadays, the seamounts inside the Madeira EEZ are subject only to small scale fisheries using bottom or drifting longlines to catch demersal fishes, mostly the bathypelagicblack scabbardfish, Aphanopus carbo, and intermediate scabbardfish, Aphanopus intermedius Parin, 1983 (see Biscoito et al 2011, Delgado et al 2013.…”

mentioning

confidence: 99%

Records of some rare deep-sea fishes caught in the Lion, Susan, and Unicorn seamounts, off the archipelago of Madeira (east-central Atlantic)

Delgado¹,

Carvalho²,

Freitas³

et al. 2017

Acta Ichthyol. Piscat.

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. 2017. Records of some rare deep-sea fishes caught in the Lion, Susan, and Unicorn seamounts, off the archipelago of Madeira (east-central Atlantic). Acta Ichthyol. Piscat. 47 (1): 91-96.Abstract. Fish communities off the seamounts inside the Madeira exclusive economic zone are scarcely known, hence the need to improve this knowledge. A bottom trawl fishing survey targeting orange roughy, Hoplostethus atlanticus Collett, 1889, was carried out on the Lion, Susan, and Unicorn seamounts in the autumn of 2001. The aim of this paper is to give an account of the catches of that survey, during which 9 tows were conducted and 21 deep-sea fish species caught, including species rarely caught. A growing interest emerged, in the last decades of the 20th century, in the development of the exploitation of deep-sea species (Merret and Haedrich 1997). During this period, commercial fishing has greatly increased the fishing effort directed to seamount-aggregated species like the orange roughy, Hoplostethus atlanticus Collett, 1889, oreos (Oreosomatidae), and alfonsinos (Beryx spp.) (see Koslow et al. 2000, Morato and. Although the seamount-related fisheries represent nowadays a high stake of the world deep-water fish catches, seamount research has mostly followed fisheries exploitation. Seamounts are still poorly understood habitats, among other issues concerning the living communities they support (Brewin et al. 2007).There is also a lack of knowledge about the life history of seamount fishes, with the majority of studies focusing on the main commercial species. Contributions on these issues are particularly important considering that seamount species, and particularly seamount-aggregating species, are more vulnerable to overfishing than other deep-sea species .Before the establishment of Exclusive Economic Zones (EEZ) in 1977, some 10 seamounts around the archipelagos of Madeira and Canaries were exploited by fishermen. The fishing gear used were mostly pelagic trawl, less frequently bottom trawl and seine. These fisheries continued intermittently after that date in the seamounts

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Reproduction and growth of Aphanopus carbo and A. intermedius (Teleostei: Trichiuridae) in the northeastern Atlantic

Cited by 10 publications

References 29 publications

Black scabbardfish,Aphanopus carbo, in the northeast Atlantic: distribution and hypothetical migratory cycle

Black scabbardfish,Aphanopus carbo, in the northeast Atlantic: distribution and hypothetical migratory cycle

Assessing the risk of vulnerable species exposure to deepwater trawl fisheries: the case of orange roughyHoplostethus atlanticusto the west of Ireland and Britain

Records of some rare deep-sea fishes caught in the Lion, Susan, and Unicorn seamounts, off the archipelago of Madeira (east-central Atlantic)

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