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Alose Feinte

Alosa agone (Scopoli 1786)

Diagnostic Description ( anglais )

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This species is distinguished from its congeners entering the freshwater of the Mediterranean basin by the following characters: an almost straight dorsal profile; thin gill rakers 38-72 (different populations average between 45 and 64); no teeth on palatine (Ref. 59043).
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Estelita Emily Capuli
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Life Cycle ( anglais )

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Most individuals reproduce only once or twice.
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Susan M. Luna
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Biology ( anglais )

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A lacustrine, pelagic species. Males reproduce for the first time at 2-3 years, females at 3-4; most reproduce only once or twice. Spawn at temperatures above 15-16°C in June to August, along the shores near the surface at night with bright moonlights. Adults feed mainly on cladocerans and copepods, also on small fish (Ref. 59043).
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Alosa agone ( anglais )

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Alosa agone is a species of ray-finned fish in the genus Alosa.[2] It is an endangered species.[3]

Species description

Alosa agone are common in the Mediterranean and the western Balkans.[3] There are also landlocked populations found in Italy.[3] The distribution of reproductive communities and the conservation status of Alosa agone in the central and eastern parts of the Mediterranean areas are poorly known.[3]

Conservation

The numbers of Alosa agone have declined due to barriers such as dams in their local areas.[3] These barriers prevent them from getting upstream to their spawning grounds and reproducing.[3] Improved water quality in some landlocked lakes has increased their numbers in recent years.[3]

Biology

The "twaite shad" are known to be very adaptive and variable as they form landlocked populations in Italy and its neighboring areas, including the western Balkans.[3] They can modify their morphology and biology according to their environment.[3] Therefore, Alosa agone, just like many Alosa species, can be either marine or freshwater fish.

References

  1. ^ Freyhof, J.; Kottelat, M. (2008). "Alosa agone". IUCN Red List of Threatened Species. 2008: e.T135611A4162172. doi:10.2305/IUCN.UK.2008.RLTS.T135611A4162172.en. Retrieved 19 November 2021.
  2. ^ Freyhof, J. & Kottelat, M. 2008. Alosa agone. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. . Downloaded on 16 December 2011.
  3. ^ a b c d e f g h i Bianco, P. G. (2002), The Status of the Twaite Shad, Alosa agone, in Italy and the Western Balkans. Marine Ecology, 23: pp. 51–64. doi:10.1111/j.1439-0485.2002.tb00007.x
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Alosa agone: Brief Summary ( anglais )

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Alosa agone is a species of ray-finned fish in the genus Alosa. It is an endangered species.

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