Brama - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Brama

The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

Antoni Amirowicz – 1st expert on this subject based on the ideXlab platform

  • genetic composition of a population of natural common bream abramis Brama roach rutilus rutilus hybrids and their morphological characteristics in comparison with parent species
    Journal of Fish Biology, 2018
    Co-Authors: Maciej K Konopinski, Antoni Amirowicz

    Abstract:

    : Common bream Abramis Brama, roach Rutilus rutilus and their hybrids were collected in the Dobczyce Reservoir in southern Poland in 2006-2013 to study whether it is better for a hybrid individual to resemble and compete with one of its parents, or to minimize competition by having a distinctive phenotype. All hybrids were F1 crosses and originated predominantly (93·2%) from matings between female A. Brama and male R. rutilus parents. In morphometric analyses, a newly defined coefficient, L3  = 2·5 (body mass) (LS  × body depth)-1 , which enables forms with similar length-depth proportions but different length-mass relationships to be distinguished was used. Morphometric and meristic characteristics of the hybrids were intermediate in comparison with the parental species, with small but significant deviation towards R. rutilus in longitudinal body dimensions (trunk and tail length) and towards A. Brama in body cross-sectional shape (body depth and L3 coefficient). This may result in a more R. rutilus like propulsion in hybrids and a more A. Brama like ability to manoeuvre.

  • Genetic composition of a population of natural common bream Abramis Brama × roach Rutilus rutilus hybrids and their morphological characteristics in comparison with parent species
    Journal of Fish Biology, 2017
    Co-Authors: Maciej K. Konopiński, Antoni Amirowicz

    Abstract:

    : Common bream Abramis Brama, roach Rutilus rutilus and their hybrids were collected in the Dobczyce Reservoir in southern Poland in 2006-2013 to study whether it is better for a hybrid individual to resemble and compete with one of its parents, or to minimize competition by having a distinctive phenotype. All hybrids were F1 crosses and originated predominantly (93·2%) from matings between female A. Brama and male R. rutilus parents. In morphometric analyses, a newly defined coefficient, L3  = 2·5 (body mass) (LS  × body depth)-1 , which enables forms with similar length-depth proportions but different length-mass relationships to be distinguished was used. Morphometric and meristic characteristics of the hybrids were intermediate in comparison with the parental species, with small but significant deviation towards R. rutilus in longitudinal body dimensions (trunk and tail length) and towards A. Brama in body cross-sectional shape (body depth and L3 coefficient). This may result in a more R. rutilus like propulsion in hybrids and a more A. Brama like ability to manoeuvre.

Ramachandran Santhanakrishnan – 2nd expert on this subject based on the ideXlab platform

  • Nest trees, habitat and breeding biology of the spotted owlet Athene Brama Brama (Temminck, 1821) in human habitation and agricultural landscape of India
    Zoology and ecology, 2015
    Co-Authors: Ramachandran Santhanakrishnan

    Abstract:

    This study examined nest tree, habitat characteristics and breeding biology of the spotted owlet Athene Brama Brama in two habitats, viz. human habitation (HH) and agricultural landscape (AL). From 2008 to 2009, 27 spotted owlet nests (15 in HH and 12 in AL) were observed in Madurai district of southern India. We found that most tree characteristics were significantly different between habitats. The percentage availability of various habitats in a 1-km radius from nest trees varied significantly between HH and AL. The breeding season for spotted owlets started in early January and continued until the end of April. Variations in (a) clutch size, (b) egg dimensions, (c) incubation period, (d) hatching success, (e) brood size, (f) fledgling success, (g) fledgling rate, and (h) breeding success of spotted owlets were observed between HH and AL. We provide photographic documentation of developmental stages of the nestlings.

  • diet composition of the barn owl tyto alba aves tytonidae and spotted owlet athene Brama aves strigidae coexisting in an urban environment
    Podoces, 2014
    Co-Authors: Ramachandran Santhanakrishnan

    Abstract:

    The comparative diet of the Barn OwlTyto alba and the Spotted Owlet Athene Brama were studied in an urban habitat of Madurai District, Tamil Nadu, Southern India, during January–December 2008. Regurgitated pellets of these two owl species were analysed to …

Karim Erzini – 3rd expert on this subject based on the ideXlab platform

  • Age and growth of Ray’s bream (Brama Brama) from the south of Portugal
    Fisheries Research, 2020
    Co-Authors: Carina Lobo, Karim Erzini

    Abstract:

    Age and growth of 234 Brama Brama Bonnaterre (1788) (Pisces: Bramidae) caught hy semi-pelagic longline off the south coast of Portugal (Algarve) was studied using otoliths for age determination. Samples consisted of fish varying in total length from 32 to 56 cm and in weight from 332 to 2032 g. Age classes from III to XII were represented in the catches. The von Bertalanffy growth curve was fitted and the length/weight relationship was calculated. (C) 2001 Elsevier Science B.V. All rights reserved

  • Age and growth of Ray’s bream (Brama Brama) from the south of Portugal
    , 2001
    Co-Authors: Carina Lobo, Karim Erzini

    Abstract:

    Abstract Age and growth of 234 Brama Brama Bonnaterre (1788) (Pisces: Bramidae) caught by semi-pelagic longline off the south coast of Portugal (Algarve) was studied using otoliths for age determination. Samples consisted of fish varying in total length from 32 to 56 cm and in weight from 332 to 2032 g. Age classes from III to XII were represented in the catches. The von Bertalanffy growth curve was fitted and the length/weight relationship was calculated.

  • The hake deepwater semi-pelagic (“pedra-bola”) longline fishery in the algarve (southern Portugal)
    Fisheries Research, 2001
    Co-Authors: Karim Erzini, J. M S Gonçalves, L. Bentes, P. G. Lino, J. Ribeiro

    Abstract:

    A 2-year study of the European hake (Merluccius merluccius) semi-pelagic (“pedra-bola”) longline fishery was carried out in the Algarve (southern Portugal). This fishery takes place on the continental slope at 200-700 m depths, using monofilament longlines that are lifted off the bottom at regular intervals by glass balls. Hook selectivity trials were carried out with four hook sizes (SIAPAL brand numbers 10, 9, 7 and 5) from March to August 1997 and May to August 1998. At least 32 species of fish and invertebrates were caught, with hake dominating the catch (41 and 45% of the catch in numbers), followed by Galeus melastomus (23 and 19%), Micromesistius poutassou (10 and 7%), Benthodesmus elongatus (8 and 5%), Etmopterus pusillus (6 and 9%) and Scyliorhinus canicula (5 and 4%). Apart from the hake, and some species of commercial value such as G. melastomus (only the large individuals), Ray’s bream (Brama Brama, 1.4 and 4%), silver scabbard fish (Lepidopus caudatus, 1 and 2.5%), swordfish (Xiphias gladius,