Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos
ABSTRACT This work analyzed length-mass relationship, growth in length, mass variations and dynamic of yolk sac depletion of Mustelus schmitti embryos, extracted from females catched by the artisanal fishery acting off La Paloma (34°39'S, 54°10'W, Uruguay) during 2006 and 2007. Differences...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400699&lng=en&tlng=en |
| _version_ | 1818653110770335744 |
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| author | Luis Orlando Inés Pereyra Santiago Silveira Laura Paesch Maria Cristina Oddone Walter Norbis |
| author_facet | Luis Orlando Inés Pereyra Santiago Silveira Laura Paesch Maria Cristina Oddone Walter Norbis |
| author_sort | Luis Orlando |
| collection | DOAJ |
| description | ABSTRACT This work analyzed length-mass relationship, growth in length, mass variations and dynamic of yolk sac depletion of Mustelus schmitti embryos, extracted from females catched by the artisanal fishery acting off La Paloma (34°39'S, 54°10'W, Uruguay) during 2006 and 2007. Differences in total length and total mass between sexes were not significant. Embryos showed a negative allometric growth for both years with a slope change near the day 170 of the year, likely to be associated with the depletion of the external yolk sac. Gompertz and Von Bertalanffy curves were adjusted for each year. Parturition date was determined around the day 300 of the year. Yolk depletion followed a logistic dynamic Yt=1/(1+e(-13.749 + 0.072*t)) for 2006 and Yt=1/(1+e(-10.472 + 0.054*t)) for 2007. Embryos showed a mean increase in total dry mass of 5.4g in 187 days which, together with yolk depletion dynamics, indicates additional energetic supply, suggesting that M. schmitti presents limited histotrophy. |
| first_indexed | 2024-12-17T02:32:42Z |
| format | Article |
| id | doaj.art-581bf16a3b9f4822be00c28b7fd92d4b |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-17T02:32:42Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-581bf16a3b9f4822be00c28b7fd92d4b2022-12-21T22:06:55ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-022413469970610.1590/1982-0224-20150001S1679-62252015000400699Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryosLuis OrlandoInés PereyraSantiago SilveiraLaura PaeschMaria Cristina OddoneWalter NorbisABSTRACT This work analyzed length-mass relationship, growth in length, mass variations and dynamic of yolk sac depletion of Mustelus schmitti embryos, extracted from females catched by the artisanal fishery acting off La Paloma (34°39'S, 54°10'W, Uruguay) during 2006 and 2007. Differences in total length and total mass between sexes were not significant. Embryos showed a negative allometric growth for both years with a slope change near the day 170 of the year, likely to be associated with the depletion of the external yolk sac. Gompertz and Von Bertalanffy curves were adjusted for each year. Parturition date was determined around the day 300 of the year. Yolk depletion followed a logistic dynamic Yt=1/(1+e(-13.749 + 0.072*t)) for 2006 and Yt=1/(1+e(-10.472 + 0.054*t)) for 2007. Embryos showed a mean increase in total dry mass of 5.4g in 187 days which, together with yolk depletion dynamics, indicates additional energetic supply, suggesting that M. schmitti presents limited histotrophy.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400699&lng=en&tlng=enEmbryo growthMatrotrophyNarrownose smoothhoundReproductive modeSouthwestern Atlantic |
| spellingShingle | Luis Orlando Inés Pereyra Santiago Silveira Laura Paesch Maria Cristina Oddone Walter Norbis Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos Neotropical Ichthyology Embryo growth Matrotrophy Narrownose smoothhound Reproductive mode Southwestern Atlantic |
| title | Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos |
| title_full | Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos |
| title_fullStr | Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos |
| title_full_unstemmed | Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos |
| title_short | Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos |
| title_sort | determination of limited histotrophy as the reproductive mode in mustelus schmitti springer 1939 chondrichthyes triakidae analysis of intrauterine growth of embryos |
| topic | Embryo growth Matrotrophy Narrownose smoothhound Reproductive mode Southwestern Atlantic |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400699&lng=en&tlng=en |
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