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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
22/09/2008 |
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Data da última atualização: |
22/09/2008 |
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Autoria: |
BUTT, K. R.; BRIONES, M. J. I.; LOWE, C. N. |
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Título: |
Fate of visual implant elastomer in tagged earthworms. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Visual Implant Elstomer (VIE) tags, designed for marking fish, have been recently appplied to
earthworms. For example, Gonzalez et al (2006) used this technique and showed that in forest
and pasture soils, tags injected into Pontoscolex corethrus housed in PVC tubes could be located
after a period of 4 months. Laboratory studies with a number of temperate earthworm species
(Butt and Lowe, 2007) showed that the biologically-compatible polymer tags remained in the
animal and could be visually located after a period in excess of 12 months. Tagging was also
shown not to affect growth to maturity, mating or cocoon production of Lumbricus terrestris.
Therefore, this technique offers opportunities for mark, release and recapture studies plus more
general earthworm longevity records under a variety of field and laboratory conditions. Published
data has suggested the tags may not remain in one piece and may move within the earthworm
body over time, migrating towards the posterior end of the animal. The work described here
sought to establish exactly where the VIE material was positioned within an earthworm after
tagging and how aspects of this material might change with time. To this end, L. terrestris,
Octolasion cyaneum, O. lacteum, Aporrectodea caliginosa and Allolobophora chlorotica were
tagged posterior to the clitellum, maintained in laboratory culture conditions. Then after various
periods of time (2 days, 1 week, 1 month, 1 year and 2 years), earthworms were preserved and
dissected, so that location and changes in the appearance of the VIE material could be recorded.
Results showed that, although there were differences between species, over time the tag material
tended to become enveloped by the chloragogenous tissue, septa and nephridia. After injection
and in the longer term (e.g. after two years), the thickness of this layer (surrounding the tag)
made tag location more difficult. This problem became more acute when the material was injected/
settled as small droplets in the post-clitellar region. It is suggested that for reliable tagging, a
reasonably large amount of VIE material needs to be precisely injected into segments anterior
to or close behind the clitellum. It is also concluded that further research is needed to determine
the maximum period of time this tagged material can be observed in different species. MenosVisual Implant Elstomer (VIE) tags, designed for marking fish, have been recently appplied to
earthworms. For example, Gonzalez et al (2006) used this technique and showed that in forest
and pasture soils, tags injected into Pontoscolex corethrus housed in PVC tubes could be located
after a period of 4 months. Laboratory studies with a number of temperate earthworm species
(Butt and Lowe, 2007) showed that the biologically-compatible polymer tags remained in the
animal and could be visually located after a period in excess of 12 months. Tagging was also
shown not to affect growth to maturity, mating or cocoon production of Lumbricus terrestris.
Therefore, this technique offers opportunities for mark, release and recapture studies plus more
general earthworm longevity records under a variety of field and laboratory conditions. Published
data has suggested the tags may not remain in one piece and may move within the earthworm
body over time, migrating towards the posterior end of the animal. The work described here
sought to establish exactly where the VIE material was positioned within an earthworm after
tagging and how aspects of this material might change with time. To this end, L. terrestris,
Octolasion cyaneum, O. lacteum, Aporrectodea caliginosa and Allolobophora chlorotica were
tagged posterior to the clitellum, maintained in laboratory culture conditions. Then after various
periods of time (2 days, 1 week, 1 month, 1 year and 2 years), earthworms were preserved and
dis... Mostrar Tudo |
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LEADER 03012naa a2200145 a 4500
001 1314902
005 2008-09-22
008 2008 bl uuuu u00u1 u #d
100 1 $aBUTT, K. R.
245 $aFate of visual implant elastomer in tagged earthworms.
260 $c2008
520 $aVisual Implant Elstomer (VIE) tags, designed for marking fish, have been recently appplied to earthworms. For example, Gonzalez et al (2006) used this technique and showed that in forest and pasture soils, tags injected into Pontoscolex corethrus housed in PVC tubes could be located after a period of 4 months. Laboratory studies with a number of temperate earthworm species (Butt and Lowe, 2007) showed that the biologically-compatible polymer tags remained in the animal and could be visually located after a period in excess of 12 months. Tagging was also shown not to affect growth to maturity, mating or cocoon production of Lumbricus terrestris. Therefore, this technique offers opportunities for mark, release and recapture studies plus more general earthworm longevity records under a variety of field and laboratory conditions. Published data has suggested the tags may not remain in one piece and may move within the earthworm body over time, migrating towards the posterior end of the animal. The work described here sought to establish exactly where the VIE material was positioned within an earthworm after tagging and how aspects of this material might change with time. To this end, L. terrestris, Octolasion cyaneum, O. lacteum, Aporrectodea caliginosa and Allolobophora chlorotica were tagged posterior to the clitellum, maintained in laboratory culture conditions. Then after various periods of time (2 days, 1 week, 1 month, 1 year and 2 years), earthworms were preserved and dissected, so that location and changes in the appearance of the VIE material could be recorded. Results showed that, although there were differences between species, over time the tag material tended to become enveloped by the chloragogenous tissue, septa and nephridia. After injection and in the longer term (e.g. after two years), the thickness of this layer (surrounding the tag) made tag location more difficult. This problem became more acute when the material was injected/ settled as small droplets in the post-clitellar region. It is suggested that for reliable tagging, a reasonably large amount of VIE material needs to be precisely injected into segments anterior to or close behind the clitellum. It is also concluded that further research is needed to determine the maximum period of time this tagged material can be observed in different species.
700 1 $aBRIONES, M. J. I.
700 1 $aLOWE, C. N.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
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Data corrente: |
22/07/2015 |
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Data da última atualização: |
29/07/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
CARVALHAES, G. C.; CUNHA, C. A.; WANDER, A. E. |
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Afiliação: |
GRACIELLE COUTO CARVALHAES; CLEYZER ADRIAN CUNHA; ALCIDO ELENOR WANDER, CNPAF. |
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Título: |
Margem de comercialização do leite em Goiás. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Revista de Política Agrícola, Brasília, DF., ano 24, n.1, p. 47-61, Jan./Fev./Mar. 2015. |
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Idioma: |
Português |
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Conteúdo: |
O objetivo deste trabalho é analisar a margem de comercialização do mercado goiano de leite UHT ao longo da cadeia no período de janeiro de 2005 a dezembro de 2013. Os resultados mostraram que a maior parte das margens obtidas com a comercialização do leite em Goiás está concentrada no segmento atacadista. Pela análise da margem de comercialização é possível perceber a grande influência que o mercado atacadista exerce sobre os preços. |
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Palavras-Chave: |
Comportamento de mercado; Goiás, GO; Mercado lácteo; Precificação. |
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Thesagro: |
Comercialização; Leite. |
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Categoria do assunto: |
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E Economia e Indústria Agrícola |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/126821/1/Margem-de-comercializacao-do-leite.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/127006/1/rpa.pdf
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Marc: |
LEADER 01065naa a2200217 a 4500
001 2020280
005 2015-07-29
008 2015 bl uuuu u00u1 u #d
100 1 $aCARVALHAES, G. C.
245 $aMargem de comercialização do leite em Goiás.
260 $c2015
520 $aO objetivo deste trabalho é analisar a margem de comercialização do mercado goiano de leite UHT ao longo da cadeia no período de janeiro de 2005 a dezembro de 2013. Os resultados mostraram que a maior parte das margens obtidas com a comercialização do leite em Goiás está concentrada no segmento atacadista. Pela análise da margem de comercialização é possível perceber a grande influência que o mercado atacadista exerce sobre os preços.
650 $aComercialização
650 $aLeite
653 $aComportamento de mercado
653 $aGoiás, GO
653 $aMercado lácteo
653 $aPrecificação
700 1 $aCUNHA, C. A.
700 1 $aWANDER, A. E.
773 $tRevista de Política Agrícola, Brasília, DF., ano 24$gn.1, p. 47-61, Jan./Fev./Mar. 2015.
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