作者: FIR 時(shí)間: 2025-3-21 23:05
https://doi.org/10.1007/978-3-658-07018-2th unpredictable relationships, morphogenic irregularities in some reproductive structures, and, apparently, modified modes of reproduction, suggest the possibilities of hybridization between taxa with both close and distant relationships.作者: GOUGE 時(shí)間: 2025-3-22 03:15 作者: chronicle 時(shí)間: 2025-3-22 07:34
https://doi.org/10.1007/978-3-531-90982-0 R.) appeared to be density dependent; 3) Recruitment was regulated through the percentage of worms that actually attained the ovigerous stage, specific fecundity, and the duration of the egg laying stage, whichappeared to be inversely correlated with density.作者: Decibel 時(shí)間: 2025-3-22 09:41
Preliminary investigations of hybridization/reticulate evolution in , (Enchytraeidae: Oligochaeta)th unpredictable relationships, morphogenic irregularities in some reproductive structures, and, apparently, modified modes of reproduction, suggest the possibilities of hybridization between taxa with both close and distant relationships.作者: 剛開(kāi)始 時(shí)間: 2025-3-22 12:55 作者: CUMB 時(shí)間: 2025-3-22 20:40
Density-dependent processes in cohorts of ,, with special emphasis on the control of fecundity R.) appeared to be density dependent; 3) Recruitment was regulated through the percentage of worms that actually attained the ovigerous stage, specific fecundity, and the duration of the egg laying stage, whichappeared to be inversely correlated with density.作者: licence 時(shí)間: 2025-3-22 23:00
Did the lumbriculids provide the ancestors of the branchiobdellidans, acanthobdellidans and leeches?t. No decision as to the rankings of the various taxa can be made until new material of . is examined and all variable characters are used to determine synapomorphic character states and monophyletic groupings within this complex.作者: 男生戴手銬 時(shí)間: 2025-3-23 01:52 作者: 含水層 時(shí)間: 2025-3-23 06:59 作者: Visual-Field 時(shí)間: 2025-3-23 11:15
https://doi.org/10.1007/978-3-531-90982-0 model (Bonomi & Di Cola, 1980), originally used for laboratory observations on . cohorts was considered, including some density control functions derived from our observations on cohort and mass cultures in some transfer rates and in fecundity rate.作者: 旅行路線 時(shí)間: 2025-3-23 15:23
https://doi.org/10.1007/978-3-531-90890-8the principal extrinsic variables controlling the asexual growth rate of the . species. The stolonization rate was analyzed as a biological parameter implicated in the instantaneous birth rate of zooids and the growth of naidid populations.作者: 使苦惱 時(shí)間: 2025-3-23 18:53
Preliminary report on the Enchytraeidae (Oligochaeta) of West Florida the same-sized area, number of sites and size of sample), but the number of species per sample was lower than in either of the other countries. It is concluded that species distribution in western Florida is very patchy. Possible reasons for this patchiness are discussed.作者: genuine 時(shí)間: 2025-3-24 00:29 作者: Mhc-Molecule 時(shí)間: 2025-3-24 03:20 作者: 飛行員 時(shí)間: 2025-3-24 07:35
Intrinsic and extrinsic variables controlling the productivity of asexual populations of , spp, (Naithe principal extrinsic variables controlling the asexual growth rate of the . species. The stolonization rate was analyzed as a biological parameter implicated in the instantaneous birth rate of zooids and the growth of naidid populations.作者: 沒(méi)血色 時(shí)間: 2025-3-24 11:33 作者: 分離 時(shí)間: 2025-3-24 18:49
Jürgen Neubarth,Martin Kaltschmittsive definition of the spermatozeugmata is proposed and more attention to the morphology of the sperm bundles when describing new oligochaete species is suggested, since it is possible to use this information for taxonomic and phylogenetic purposes.作者: Affirm 時(shí)間: 2025-3-24 22:24
https://doi.org/10.1007/978-3-531-90890-8ltures were carried out to determine the structure, density and biomass of the populations. A maximal density of 1396314 worms was recorded after 85 days of culture. Net production reached 21.48 g m. day. after 26 days in a culture initiated from cocoons.作者: 薄荷醇 時(shí)間: 2025-3-25 02:02
https://doi.org/10.1007/978-3-531-90890-8 There was some indication of individuals with regressed genital organs indicating that they may live longer than one year. At the 27 m station . is part of a complex and well developed benthic community. Temporal variation in this species was highly correlated to that of other major taxa (bivalves, ophiuroids).作者: fulcrum 時(shí)間: 2025-3-25 05:57
Phylogeny and origins of Enchytraeidaee analyses as evolutionary or phylogenetic groups. Five are substantiated as monophyletic: ., and .. In addition to most of the achaetine genera, . is shown to be in great need of revision. Its recognition is a continuing source of confusion to taxonomic resolution of Enchytraeidae.作者: Forehead-Lift 時(shí)間: 2025-3-25 08:06 作者: 財(cái)政 時(shí)間: 2025-3-25 14:07
Biological studies upon , Bouguenec & Giani 1987 in breeding culturesltures were carried out to determine the structure, density and biomass of the populations. A maximal density of 1396314 worms was recorded after 85 days of culture. Net production reached 21.48 g m. day. after 26 days in a culture initiated from cocoons.作者: fibula 時(shí)間: 2025-3-25 15:59 作者: 繁重 時(shí)間: 2025-3-25 23:49 作者: nominal 時(shí)間: 2025-3-26 01:55
https://doi.org/10.1007/978-3-531-90982-0rm was able to reproduce through parthenogenesis. Thus, the two forms have remarkable differences, indicating genetic differences, and they may be considered not as forms, but rather as distinct species.作者: Redundant 時(shí)間: 2025-3-26 08:16
Histophysiology of digestion and observations on the structure of the alimentary canal in the ectosyse activity appears in the intestinal margins during the alkaline phase of digestion. Scattered, pyramidal cells found only in the anterior intestine contain yellow refractile spheres. The spheres stain alcian blue pH 2.5 and bromophenol blue positive and exhibit a strong acid phosphatase activity a作者: LAVE 時(shí)間: 2025-3-26 09:19 作者: 結(jié)合 時(shí)間: 2025-3-26 14:30 作者: 斗爭(zhēng) 時(shí)間: 2025-3-26 17:16
https://doi.org/10.1007/978-3-531-90982-0The body wall muscle fibers of . and . have been hystochemically characterized. The results have been compared with similar data on . and .. The various enzymatic activities have been correlated with the ultrastructural data and a possible functional meaning of the different muscle layers has been proposed.作者: Interdict 時(shí)間: 2025-3-27 00:16 作者: 牛馬之尿 時(shí)間: 2025-3-27 02:18
Histochemical analysis of oligochaete body wallThe body wall muscle fibers of . and . have been hystochemically characterized. The results have been compared with similar data on . and .. The various enzymatic activities have been correlated with the ultrastructural data and a possible functional meaning of the different muscle layers has been proposed.作者: 空氣傳播 時(shí)間: 2025-3-27 07:44 作者: indemnify 時(shí)間: 2025-3-27 11:59
Body wall organization in enchytraeidsheir circular muscles, whereas longitudinal muscles show significant differences, allowing an easy identification of the various worm species. In particular, differences are noticeable in the external longitudinal layer. These observations suggest that structural and ultrastructural muscle fiber organizations can be used as a taxonomic tool.作者: BROOK 時(shí)間: 2025-3-27 15:34
T-system in muscles of microdrilesisternae, membrane foldings and extracellular spaces between fibers is described. The data seem to indicate that the spaces between fibers within each functional unit are interpretable as T-tubules of a cross-striated fiber.作者: ingenue 時(shí)間: 2025-3-27 21:41 作者: 枕墊 時(shí)間: 2025-3-27 22:36 作者: 壓艙物 時(shí)間: 2025-3-28 06:03
Kluwer Academic Publishers, Dordrecht 1989作者: 拉開(kāi)這車(chē)床 時(shí)間: 2025-3-28 06:30
https://doi.org/10.1007/978-3-8349-7054-1ngle line of evolution between lumbriculids, branchiobdellidans, and leeches, supports the alternative hypothesis of an independent origin of most if not all of these groups. Discovery of ., a lumbriculid that is clearly convergent with . in terms of the pharynx, lends further support to this concep作者: 職業(yè) 時(shí)間: 2025-3-28 13:24 作者: URN 時(shí)間: 2025-3-28 18:35 作者: 引起 時(shí)間: 2025-3-28 21:04 作者: 叢林 時(shí)間: 2025-3-29 02:52 作者: 史前 時(shí)間: 2025-3-29 05:25 作者: 館長(zhǎng) 時(shí)間: 2025-3-29 08:25
Jürgen Neubarth,Martin Kaltschmitt compared to the one of .. It was concluded that the spermatozeugmata of . and . (Tubificinae) were very similar to the . ones in having a parallel arrangement of the central fertilizing sperm surrounded by a cortex made of packed atypical spermatozoa. On the contrary, . and . (Limnodriloidinae) and作者: 呼吸 時(shí)間: 2025-3-29 11:42 作者: 捏造 時(shí)間: 2025-3-29 17:06
https://doi.org/10.1007/978-3-531-90982-0ers, in the cocoon, begin to develop as platymyarian fibers, then develop into shallow coelomyarian ones and finally, just before hatching, reach a flat circomyarian stage. After hatching, the fibers grow only in size due to an increase in contractile material in the helical sarcomere system. Indica作者: obtuse 時(shí)間: 2025-3-29 23:43
https://doi.org/10.1007/978-3-531-90982-0isternae, membrane foldings and extracellular spaces between fibers is described. The data seem to indicate that the spaces between fibers within each functional unit are interpretable as T-tubules of a cross-striated fiber.作者: 帶子 時(shí)間: 2025-3-30 01:04 作者: canvass 時(shí)間: 2025-3-30 05:02 作者: 審問(wèn),審訊 時(shí)間: 2025-3-30 09:10 作者: 可卡 時(shí)間: 2025-3-30 13:42 作者: 棲息地 時(shí)間: 2025-3-30 19:25
https://doi.org/10.1007/978-3-531-90890-8(architomy) or sexual reproduction. The number of ova per cocoon varies from 5 to 20 (x? = 10.9). The generation period (from cocoon to next cocoon) varies from 14 to 39 days (x? = 26.1) according to the period of the year. The number of generations per year is between 7.3 and 26.1 (x? = 14). A matu作者: vitreous-humor 時(shí)間: 2025-3-30 22:38 作者: 全部逛商店 時(shí)間: 2025-3-31 03:29
https://doi.org/10.1007/978-3-531-90890-8perimental glass enclosures immersed . and filled with pond water receiving injections of fertilizers (P.O.) and natural filtered periphyton extracts (particles < 70 .m). The growth rate of the experimental populations was not significantly affected by the concentration of fertilizers added to cultu作者: 無(wú)法治愈 時(shí)間: 2025-3-31 07:34 作者: Cougar 時(shí)間: 2025-3-31 12:44 作者: 思想流動(dòng) 時(shí)間: 2025-3-31 13:38
https://doi.org/10.1007/978-3-531-90982-0heir circular muscles, whereas longitudinal muscles show significant differences, allowing an easy identification of the various worm species. In particular, differences are noticeable in the external longitudinal layer. These observations suggest that structural and ultrastructural muscle fiber organizations can be used as a taxonomic tool.作者: 含糊其辭 時(shí)間: 2025-3-31 17:50 作者: MAOIS 時(shí)間: 2025-3-31 22:12
Did the lumbriculids provide the ancestors of the branchiobdellidans, acanthobdellidans and leeches?ngle line of evolution between lumbriculids, branchiobdellidans, and leeches, supports the alternative hypothesis of an independent origin of most if not all of these groups. Discovery of ., a lumbriculid that is clearly convergent with . in terms of the pharynx, lends further support to this concep作者: 半圓鑿 時(shí)間: 2025-4-1 05:25
Phylogeny and origins of Enchytraeidaecies of Enchytraeidae but that Achaetinae is not monophyletic. The earliest species of bisetate enchytraeid now extant are restricted to South America, Africa, and India. As this part of the enchytraeid lineage is ancestral to other enchytraeid taxa, it is suggested that Enchytraeidae may have arise作者: GEAR 時(shí)間: 2025-4-1 07:28
Preliminary investigations of hybridization/reticulate evolution in , (Enchytraeidae: Oligochaeta)the lineage. The homoplastic occurrence of basally unpaired peptonephridia in some enchytraeid species has similarly obscured the limits of .. Taxa with unpredictable relationships, morphogenic irregularities in some reproductive structures, and, apparently, modified modes of reproduction, suggest t作者: conflate 時(shí)間: 2025-4-1 10:09
Preliminary report on the Enchytraeidae (Oligochaeta) of West Floridan all moist or wet soils and in marine habitats enriched by organic matter but were absent or rare in very dry soils, saturated or flooded substrates and clean intertidal sand. Between 70 and 75 species were distinguished of which 50–55 are new to North America and about 25 are probably new to scien作者: Fermentation 時(shí)間: 2025-4-1 16:43 作者: 涂掉 時(shí)間: 2025-4-1 20:49 作者: hedonic 時(shí)間: 2025-4-1 22:42
