FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2329221932> ?p ?o ?g. }

• W2329221932 endingPage "61" @default.
• W2329221932 startingPage "61" @default.
• W2329221932 abstract "Many temperate ascidians reproduce seasonally but the factors controlling their gametogenic cycles have not been experimentally demonstrated. I tested the effects of daylength on gametogenesis in three ascidians (Boltenia villosa, Styela gibbsii, and Chelyosoma productum) by exposing animals to normal or reversed light cycles and measuring gonad and oocyte sizes. Under a normal cycle, all species followed patterns reported for field populations. B. villosa showed evidence of continuous reproduction; S. gibbsii and C. productum spawned primarily in the spring (though a secondary mid-winter spawn may also have occurred in S. gibbsii). Altering the light cycle demonstrated that the gametogenic cues differ in these three species. Gametogenesis in B. villosa and S. gibbsii was largely unaffected by a reversed light treatment but the cycle of C. productum was dramatically changed. Even in C. productum, however, the gametogenic cycle was not completely reset in the 12-month experiment. This suggests that other factors (e.g., temperature, endogenous rhythms) contribute to gametogenic control. Longer-term experiments are needed to establish the relative importance of light cycle in these species. Additional key words: tunicates, reproduction, seasonality, synchrony, daylength Synchronous spawning is critical for marine invertebrates that release gametes into the water column and rely on currents for fertilization. Water temperature, light, phytoplankton abundance, lunar cycle, and presence of conspecifics all may cue populations to synchronize spawning and maximize fertilization (reviewed by Giese & Kanatani 1987; see also Starr et al. 1990, 1991; Tyler et al. 1992). For such cues to be effective, however, some earlier signal must entrain gametogenic cycles so that gonads contain viable sperms and full-grown oocytes or ova when the spawning cue arrives. Laboratory experiments have shown that gonad growth and maturation cycles in some marine invertebrates are affected by temperature or food abundance (reviewed by Giese & Pearse 1974; see also Babcock et al. 1986; Franz 1986; Tyler 1988; Tyler & Young 1992; Tyler et al. 1992; Beauchamp 1993). Some of the clearest evidence for extrinsic control of gametogenesis, however, comes from experimental studies with light. For example, gametogenic cycles of polychaetes (Olive & Pillai 1983; Fong & Pearse 1992a,b), a cephalopod (Richard 1967), seastars (Pearse & Eernisse 1982; Pearse & Beauchamp 1986; Pearse & Walker 1986; Pearse et al. 1986a; Xu & Barker 1990), sea urchins (Pearse et al. 1986b; McClintock & Watts 1990), and a cephalochordate (Fang et al. 1989) have been altered or completely reset by simple modifications of the light cycle. Giese & Kanatani (1987) suggest that daylength may be a fairly general gametogenic cue, but to date, only a few species in a few phyla have been studied. In this paper, I report on the first test for such effects in ascidians (phylum Chordata, subphylum Urochordata). Millar (1952, 1958) and Berrill (1975) suggested that temperature controls gametogenesis in ascidians. At temperate latitudes where annual temperature fluctuations are large and predictable, gametogenic cycles could cue to temperature changes. In tropical waters where temperatures remain quite constant, absence of the temperature cue could lead to non-seasonal reproduction. Consistent with this hypothesis, temperate ascidian species often show highly seasonal reproduction (reviewed by Millar 1971; Berrill 1975) while continuous reproduction has been demonstrated for some tropical species (Goodbody 1961, 1963). However, temperature control of ascidian gametogenesis has never been tested experimentally, and Svane & Young (1989) suggest that daylength should also be considered. The hypothesis that light controls reproductive seasonality can accommodate continuously reproducing tropical species since annual changes in daylength This content downloaded from 207.46.13.129 on Sun, 26 Jun 2016 07:01:17 UTC All use subject to http://about.jstor.org/terms" @default.
• W2329221932 created "2016-06-24" @default.
• W2329221932 creator A5046825416 @default.
• W2329221932 date "1997-01-01" @default.
• W2329221932 modified "2023-09-26" @default.
• W2329221932 title "Light Cycles and Gametogenesis in Three Temperate Ascidian Species" @default.
• W2329221932 cites W1173186620 @default.
• W2329221932 cites W1539227095 @default.
• W2329221932 cites W1562702058 @default.
• W2329221932 cites W1579846885 @default.
• W2329221932 cites W1975582344 @default.
• W2329221932 cites W1980727586 @default.
• W2329221932 cites W1984512625 @default.
• W2329221932 cites W1986515540 @default.
• W2329221932 cites W2005193213 @default.
• W2329221932 cites W2005955149 @default.
• W2329221932 cites W2017612196 @default.
• W2329221932 cites W2018623400 @default.
• W2329221932 cites W2026644690 @default.
• W2329221932 cites W2028161347 @default.
• W2329221932 cites W2042709870 @default.
• W2329221932 cites W2058142311 @default.
• W2329221932 cites W2058672602 @default.
• W2329221932 cites W2059594563 @default.
• W2329221932 cites W2065985154 @default.
• W2329221932 cites W2066210665 @default.
• W2329221932 cites W2077200748 @default.
• W2329221932 cites W2082502454 @default.
• W2329221932 cites W2088220610 @default.
• W2329221932 cites W2092582874 @default.
• W2329221932 cites W2111356499 @default.
• W2329221932 cites W2113830455 @default.
• W2329221932 cites W2116018083 @default.
• W2329221932 cites W2134654456 @default.
• W2329221932 cites W2136956002 @default.
• W2329221932 cites W2149035127 @default.
• W2329221932 cites W2184587853 @default.
• W2329221932 cites W2317000385 @default.
• W2329221932 cites W2489624142 @default.
• W2329221932 cites W2604832538 @default.
• W2329221932 cites W2736186878 @default.
• W2329221932 cites W2897955617 @default.
• W2329221932 doi "https://doi.org/10.2307/3226925" @default.
• W2329221932 hasPublicationYear "1997" @default.
• W2329221932 type Work @default.
• W2329221932 sameAs 2329221932 @default.
• W2329221932 citedByCount "24" @default.
• W2329221932 countsByYear W23292219322012 @default.
• W2329221932 countsByYear W23292219322016 @default.
• W2329221932 countsByYear W23292219322017 @default.
• W2329221932 countsByYear W23292219322019 @default.
• W2329221932 countsByYear W23292219322023 @default.
• W2329221932 crossrefType "journal-article" @default.
• W2329221932 hasAuthorship W2329221932A5046825416 @default.
• W2329221932 hasConcept C179933525 @default.
• W2329221932 hasConcept C18903297 @default.
• W2329221932 hasConcept C196843134 @default.
• W2329221932 hasConcept C39297687 @default.
• W2329221932 hasConcept C505870484 @default.
• W2329221932 hasConcept C78458016 @default.
• W2329221932 hasConcept C81461190 @default.
• W2329221932 hasConcept C86803240 @default.
• W2329221932 hasConcept C90856448 @default.
• W2329221932 hasConceptScore W2329221932C179933525 @default.
• W2329221932 hasConceptScore W2329221932C18903297 @default.
• W2329221932 hasConceptScore W2329221932C196843134 @default.
• W2329221932 hasConceptScore W2329221932C39297687 @default.
• W2329221932 hasConceptScore W2329221932C505870484 @default.
• W2329221932 hasConceptScore W2329221932C78458016 @default.
• W2329221932 hasConceptScore W2329221932C81461190 @default.
• W2329221932 hasConceptScore W2329221932C86803240 @default.
• W2329221932 hasConceptScore W2329221932C90856448 @default.
• W2329221932 hasIssue "1" @default.
• W2329221932 hasLocation W23292219321 @default.
• W2329221932 hasOpenAccess W2329221932 @default.
• W2329221932 hasPrimaryLocation W23292219321 @default.
• W2329221932 hasRelatedWork W1977809122 @default.
• W2329221932 hasRelatedWork W2025313962 @default.
• W2329221932 hasRelatedWork W2072419948 @default.
• W2329221932 hasRelatedWork W2085964870 @default.
• W2329221932 hasRelatedWork W2134805212 @default.
• W2329221932 hasRelatedWork W2162372112 @default.
• W2329221932 hasRelatedWork W2241640855 @default.
• W2329221932 hasRelatedWork W2407259439 @default.
• W2329221932 hasRelatedWork W3042605432 @default.
• W2329221932 hasRelatedWork W4226020444 @default.
• W2329221932 hasVolume "116" @default.
• W2329221932 isParatext "false" @default.
• W2329221932 isRetracted "false" @default.
• W2329221932 magId "2329221932" @default.
• W2329221932 workType "article" @default.