In spite of shrinking populations, the Allis shad (Alosa alosa Linnaeus, 1758) is a species of commercial importance in Europe. On the Iberian Peninsula, especially in the international Minho River, it also represents an important cultural heritage. From the mid-twentieth century on, a marked decrease in the number of spawners occurred in that river, following the reduction of available habitat due to dam construction. We investigated the biology and ecology of the Minho River’s Allis shad population, considering: spawners age structure and migration behaviour, reproductive biology, hybridization with Twaite shad (Alosa fallax Lacepède, 1803), juvenile growth, habitats and diet, as well as parasites. Results suggest that males migrated 1 year earlier than females and earlier in the season. Females’ gonadosomatic index increased with time and was higher within the spawning area. According to gill raker numbers, the level of hybridization is higher in juveniles than in adult samples (17 and 3.6 % respectively). To the best of our knowledge, we present the first report of the parasite Anisakis pegreffii in Allis shad, as well as other mouth and visceral cavity parasites. We also reported the first molecular confirmation of the parasite Rhadinorhynchus pristis to this species. Our results will be useful for future management and conservation of the studied population, which is one of the last stable European shad populations.
Reviews in Fish Biology and Fisheries – Springer Journals
Published: Mar 18, 2015
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera