Journal article Open Access
R. Rossi; M. Lucchini; M. G. Rizzo; A. Carrieri
<?xml version='1.0' encoding='utf-8'?> <resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://datacite.org/schema/kernel-4" xsi:schemaLocation="http://datacite.org/schema/kernel-4 http://schema.datacite.org/meta/kernel-4.1/metadata.xsd"> <identifier identifierType="URL">https://www.openaccessrepository.it/record/103965</identifier> <creators> <creator> <creatorName>R. Rossi</creatorName> </creator> <creator> <creatorName>M. Lucchini</creatorName> </creator> <creator> <creatorName>M. G. Rizzo</creatorName> </creator> <creator> <creatorName>A. Carrieri</creatorName> </creator> </creators> <titles> <title>Use of intensive rearing systems as back‐up for coastal lagoon aquaculture: an experience with eels, Anguilla anguilla L., in the Comacchio lagoons</title> </titles> <publisher>INFN Open Access Repository</publisher> <publicationYear>1988</publicationYear> <subjects> <subject>Aquatic Science</subject> </subjects> <dates> <date dateType="Issued">1988-10-01</date> </dates> <language>en</language> <resourceType resourceTypeGeneral="Text">Journal article</resourceType> <alternateIdentifiers> <alternateIdentifier alternateIdentifierType="url">https://www.openaccessrepository.it/record/103965</alternateIdentifier> </alternateIdentifiers> <relatedIdentifiers> <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1111/j.1365-2109.1988.tb00585.x</relatedIdentifier> <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://www.openaccessrepository.it/communities/itmirror</relatedIdentifier> </relatedIdentifiers> <rightsList> <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights> </rightsList> <descriptions> <description descriptionType="Abstract">. The possibility of using eels from intensive rearing ponds to restock natural basins has been investigated by comparing growth, survival and rate of yellow-to-silver metamorphosis of 'wild type' eels and of eels from an intensive rearing pond. A total of 2243 marked eels were released into a closed natural environment of 22ha; 1254 were wild type (average length 45·6 ± 9·0cm), and 989 from an intensive rearing pond, split by a mechanical grader in two groups. The first group was made of 617 well-growing eels (44·9 ± 3·0cm), the second one of 372 smaller eels (36·9 ± 4·3cm) which had not adapted to the artificial conditions. The starting size being equal the animals grew to the same extent; in some cases the animals previously adapted to the artificial pond grew better than the wild type. The rate of metamorphosis from yellow to silver eel was 28·4% for the wild type eels and 22% for the others, although the latter became mostly silver males. Survival of the wild type eels (starting with the 35-cm size class and covering the period from April to December) was calculated by mark-recapture at approximately 98·6%. For the eels previously well adapted to the intensive rearing pond it was only 85%, indicating some difficulty in competing in the natural environment. The good growth shown by the smaller eels, with a survival of about 90%, would seem to indicate that these animals might be effectively used for restocking purposes, thus favouring an integration between the intensive ponds and the extensive environments.</description> </descriptions> </resource>
Views | 0 |
Downloads | 0 |
Data volume | 0 Bytes |
Unique views | 0 |
Unique downloads | 0 |