LIFE HISTORY CHARACTERISTICS OF BOTRYLLOIDES (TUNICATA) POPULATIONS IN AKKO BAY, MEDITERRANEAN COAST OF ISRAEL
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Populations of botryllid ascidians (Botrylloides sp.) were investigated during October 1988-October 1990 along the subtidal of Akko (Acre) Bay, Israel. The studied area (600 m2) was visited every 1.5–2 months, and 50 stones per visit were randomly sampled. A total of 2,067 colonies were collected, of which 2.0% were found in a state of zooid regression. All colonies were found on the lower surface of stones. They were recorded year-round but showed marked seasonal fluctuations, from as many as 410 colonies per visit in the summer months to 13 colonies per visit in the winter. Botrylloides coverage area varied from 4.4% (summer) to 0.9% (winter) of total stone undersurface area. During the autumn and winter months, 49.2–63.2% of the stones were free of Botrylloides colonies, compared to 4.5% of the summer collections. Only 2–2.7% of the stones collected in winter were populated by 6 or more colonies, compared to 50.5% of the summer stones. Reproductive activity was correlated with monthly mean water temperatures and colony size. During January-April, only a few colonies were fertile, while in August more than half were sexually mature. Examinations of all studied colonies revealed the existence of three distinctive morphs (subpopulations) which differ in their colors, system organization, zooid orientation, relative abundance, and reproductive seasons. The possible existence of only one Botrylloides species (probably B. leachi) in this area or of three different species is discussed. The taxonomic difficulties in distinguishing between closely related species of botryllid ascidians prevent final conclusions.
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-
Aron S., Sole-Cava A.Genetic evaluation of the taxonomic status of two varieties of the cosmopolitan ascidian Botryllus niger (Ascidiaceae: Botryllidae) Biochem. Syst. Ecol 1991 19 271 276
-
Berrill N.J.The Tunicata Ray Society London 1950
-
Boyd H.C., Brown S.K., Haip J.A., Weissman I.L.Growth and sexual maturation of laboratory-cultured Monterey Botryllus schlossen Biol. Bull 1986 170 91 109
-
Brunetti R.Biological cycle of Botrylloides leachi (Savigny) (Ascidiacea) in the Venetian lagoon Vie et Milieu 1976 26 105 122
-
Brunetti R.Ascidians of the Venice lagoon I. Annotated inventory of species. Ann. Inst. Oceanogr. (Paris) (N.S.) 1979 55 95 109
-
Brunetti R., Menin F.Ascidians of the Laguna Veneto II. Distribution and ecological observations. Boll. Zool 1977 44 337 352
-
Brunetti R., Leghi L., Bressan M., Marin M.G.Combined effects of temperature and salinity on colonies of Botryllus schlossen Botrylloides leachi (Ascidiacea) from the Venetian lagoon Mar. Ecol. Prog. Ser 1980 2 303 314
-
Burighel P., Brunetti R., Zaniolo G.Hibernation of the colonial ascidian Botrylloides leachi (Savigny): histological observations Boll. Zool 1976 43 293 301
-
Carwille A.Settlement of larvae, colony growth and longevity in three species of ascidians and the effect on the species composition of a marine fouling community. Ph.D. dissertation, Univ. of California, Los Angeles 1989
-
Davis A.Contrasting population dynamics and life histories in two populations of the colonial subtidal ascidian Podoclavella moluccensis Mar. Ecol. Prog. Ser 1989 51 107 119
-
Dybern I.B.Distribution and ecology of ascidians in Kviturdvikpollen and Vagsbopollen on the west coast of Norway Sarsia 1969 37 21 40
-
Grosberg K.R.Competition ability influences habitat choice in marine invertebrates Nature (London) 1981 290 700 702
-
Grosberg K.R.Ecological, genetical and developmental factors regulating life history variation in a population of the colonial ascidian Botryllus schlosseri (Pallas) Savigny. Ph.D. dissertation, Yale Univ., New Haven, CT 1982
-
Harant H.Rapport sur les tuniciers Trans. Zool. Soc 1927 3 365 373
-
Harveli L.D., Grosberg R.K.The timing of sexual maturity in colonial animals Ecology 1988 69 1855 1864
-
Kott P.The Australian Ascidians I. Phlebobranchia and Stolidobranchia. Mem. Qd. Mus 1985 23 1 440
-
Lafargue F., Ramos A.A., Turon X., Banaigs B, Wahl W.The littoral ascidians of the Spanish Mediterranean I. From Port Bou to the Isias Medas. Vie et Milieu 1986 36 133 139
-
Lilker-Levav T.Allogeneic responses in Botryllus schlosseri and Botrylloides leachi from the Mediterranean coast of Israel. M.Sc. thesis, Tel Aviv Univ. (in Hebrew, English abstr.) 1992
-
Medioni P.A.Les peuplements sessiles des fonds rocheux de la région de Banyuls-sur-Mer: Ascidies Bryozoaires Vie et Milieu 1970 21 591 656
-
Millar R.H.The annual growth and reproductive cycle in four ascidians J. Mar. Biol. Assoc. U 1952 31 41 61
-
Monniot C., Monniot F.Les ascidies de Polynésie Francaise Mem. Mus. Natl. Hist. Nat. Ser. A Zool 1987 133 1 155
-
Myers P.E.Space versus other limiting resources for a colonial tunicate, Botrylloides leachi (Savigny) on fouling plates J. Exp. Mar. Biol. Ecol 1990 141 47 52
-
Oka H., Watanabe H.Vascular budding in Botrylloides Biol. Bull 1959 117 340 346
-
Pérès J.M.Ascidies recoltées sur les côtes Méditerranéennes d'Israel. Bull. Res. Counc. Isr. 7B: 1958 143 150
-
Pérès J.M.Sur une collection d'ascidies de la côte Israelienne de la mer rouge et de la péninsule du Sinai State of Israel, Ministry of Agriculture, Sea Fisheries Res. Stat. Bull 1962 30 39 47
-
Salfi M.Gli ascidiacei del golfo di Napoli Publication of the Station Zoologica Napoli 1931 11 293 360
-
Shlemberg Z.Ecological and developmental aspects in the biology and Botrylloides leachi, M.Sc. thesis, Tel Aviv Univ 1991
-
Turon X.The ascidians of Tossa de Mar (NE Spain) II. Biological cycles of the colonial species. Cah. Biol. Mar 1988 29 407 418
-
Van Name W.G.The North and South American ascidians Bull. Amer. Mus. Natl. Hist 1945 84 1 476
-
White T.C.J. of the Quekett Microscopical Club 1877 4 277 280A contribution to the life history of Botrylloides
-
Yund P.O., Feldgarden M.Rapid proliferation of historecognition alleles in populations of a colonial ascidian J. Exp. Zool 1992 263 442 452
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LIFE HISTORY CHARACTERISTICS OF BOTRYLLOIDES (TUNICATA) POPULATIONS IN AKKO BAY, MEDITERRANEAN COAST OF ISRAEL
In: Israel Journal of Ecology and EvolutionSearch for other papers by B. RINKEVICH in
Current site
Google Scholar
PubMed
Search for other papers by Z. SHLEMBERG in
Current site
Google Scholar
PubMed
Search for other papers by T. LILKER-LEVAV in
Current site
Google Scholar
PubMed
Search for other papers by M. GOREN in
Current site
Google Scholar
PubMed
Search for other papers by L. FISHELSON in
Current site
Google Scholar
PubMed
Populations of botryllid ascidians (Botrylloides sp.) were investigated during October 1988-October 1990 along the subtidal of Akko (Acre) Bay, Israel. The studied area (600 m2) was visited every 1.5–2 months, and 50 stones per visit were randomly sampled. A total of 2,067 colonies were collected, of which 2.0% were found in a state of zooid regression. All colonies were found on the lower surface of stones. They were recorded year-round but showed marked seasonal fluctuations, from as many as 410 colonies per visit in the summer months to 13 colonies per visit in the winter. Botrylloides coverage area varied from 4.4% (summer) to 0.9% (winter) of total stone undersurface area. During the autumn and winter months, 49.2–63.2% of the stones were free of Botrylloides colonies, compared to 4.5% of the summer collections. Only 2–2.7% of the stones collected in winter were populated by 6 or more colonies, compared to 50.5% of the summer stones. Reproductive activity was correlated with monthly mean water temperatures and colony size. During January-April, only a few colonies were fertile, while in August more than half were sexually mature. Examinations of all studied colonies revealed the existence of three distinctive morphs (subpopulations) which differ in their colors, system organization, zooid orientation, relative abundance, and reproductive seasons. The possible existence of only one Botrylloides species (probably B. leachi) in this area or of three different species is discussed. The taxonomic difficulties in distinguishing between closely related species of botryllid ascidians prevent final conclusions.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 237 | 19 | 7 |
| Full Text Views | 8 | 1 | 0 |
| PDF Views & Downloads | 7 | 0 | 0 |
