period. The growth rate of class "0" was much
higher at the shallower stations (3 m) in response
to the high energy environment favouring the
trophic input to the population and most
favourable sediments texture. In the other stations, the growth rate may have been negatively
affected by hypoxic conditions during the summer period, resulting also in a higher mortality.
Acknowledgements. This work was carried out as a part of a
National Program (40% MURST). The authors thank the crew
of Daphne II for the technical support during the sampling
campaigns and the Emilia-Romagna Environmental Agency
for the physical-chemical data.
References
Albertelli G, Bedulli D, Cattaneo-Vietti R et al (1998) Trophic features of benthic communities in the Northern Adriatic Sea.
BioI Mar Medit 5(1): 136-143
Ambrogi R (1997) Tra Po e Adriatico: il sistema ecologico del
Delta Padano. In: Prospettive di ricerca in ecologia delle
acque. Quaderni IRSA 103, pp 188-208
Ambrogi R, Bedulli D, Zurlini G (1990) Spatial and temporal patterns in structure of macrobenthic assemblages: a threeyear study in the Northern Adriatic Sea in front of the Po
River Delta. PSZNI Mar Ecol 11:25-41
Ambrogi R, Fontana P, Gambi MC (1995) Population dynamics
and estimate of secondary production of Owenia jitsiformis
Delle Chiaje (Polychaeta. Oweniidae) in the coastal area of
the Po river Delta (Italy). In: Eleftheriou A et al (eds) Biology
and ecology of shallow coastal waters. Olsen & Olsen,
Fredensborg, pp 207-214
Buchanan JB (1984) Sediment analysis. In: Holme NA, McIntyre
AD (eds) Methods for the study of marine benthos. 2nd eel
Blackwell. Oxford, pp 41-65
Crisp OJ (1984) Energy flow measurements. In: Holme NA and
Mcintyre AD (eds) Methods for the study of marine benthos, 2nd eel Blackwell Sci Publ Oxford, pp 284-372
Dauvin IC, Gillet P (1991) Spatia-temporal variability in population structure of Owenia fusiformis Delle Chiaje (Anellida:
Polychaeta) from the Bay of Seine (Eastern English
Channel). I Exp Mar BioI Eco1152: 105-122
Dauvin IC, Thiebaut E (1994) Is Oweniafusiformis Delle Chlaje a
cosmopolitan species? In: Dauvin IC Laubier L Reish DJ
(eds). Actes de Ia 4eme Conference Internationale des
Polychetes. Mem Mus Natn Hist Nat 162: 383-404
Desroy N, Olivier F, Retiere C (1997) Effects of individual behavSecondary Production of Owenia fusiformis
269
iours, inter-individual interactions with adult Pectin aria
koreni and Owenia fusiformis (Annelida, Polychaeta), and
hydrodynamism on Pectinaria koreni recruitment. Bull Mar
Sci 60: 547-558
Diaz RI, Rosenberg R (1995) Marine benthic hypoxia: a review of
its ecological effects and the behavioural responses of benthic macrofauna. Oceanogr Mar BioI 33: 245-303
Fauchald K, Jumars PA (1979) The diet of the worms: a study of
Polychaete feeding guilds. Oceanogr Mar BioI Annu Rev 17:
193-284
Gambi MC (1989) Osservazioni su morfologia funzionale e comportamento trofico di Owenia fusiformis delle Chiaje
(Polychaeta, Oweniidae) in rapporto ai fattori ambientali
Oebalia 15: 145-155
Gentil F, Dauvin IC (1989) Etude allometrique de Ia Polycbete
Owenia fusiformis Delle Chlaje. J Rech Oceanogr 1: 58-60
Menard F, Gentil F, Dauvin IC (1989) Population dynamics and
secondary production of Owenia fusiformis Delle Chlaje
(Polychaeta) from the Bay of Seine (eastern English
Channel). J Exp mar BioI Ecol133: 151-167
Moodley L, Heip CHR, Middelburg IT (1998) Benthic activit in
sediments of the Northwest Adriatic Sea: sediments oxygen
consumption, macro and meiofauna dynamics. J Sea Res 40:
263-280
Montanari G, Ghetti A, Ferrari CR (1998) Eutrofizzazione delle
acque costiere dell'Emilia Romagna. Rapporto annuale
1997, Regione Emilia Romagna, Assessorato Territorio,
Programmazione e Ambiente, ARPA, 220 pp
Nilsen R, Holthe T (1985) Arctic and Scandinavian Oweniidae
(Polychaeta) with a description of Myriochele fragilis and
comments on the phylogeny of the family. Sarsia 70: 17-32
Olivier F. Dellroy N, Retiere C (1996) Habitat selection and adultrecruit interactions in Pectinaria koreni (Malmgren)
(Annelida, Polychaeta) post-larval populations - results of
flume experiments. J Sea Res 36: 217-226
Rinaldi A, Montanari G, Ghetti A, Ferrari CR. Mazziotti C (1997)
EutroflZZazione delle acque costiere dell'Emilia Romagna.
Rappotto annuale 1996. Regione Emilia Romagna,
Assessorato Territorio, Programmazione e Ambiente, ARPA,
234pp
Thiebaut E, Cabioch L, Dauvin IC, Retiere C, Genti! F (1997)
Spatiotemporal persistence of the Abra alba - Pectinaria
koreni muddy fine sand community of the eastern Bay of
Seine. J Mar BioI Ass UK 77: 1165-1185
Vollenweider RA, Rinaldi A, Montanari G (1992) Eutrophication
structure and dynamics of a marine coastal system. Results
of a ten-year monitoring along the Emilia-Romagna coast
(Northwest Adriatic Sea). In: Vollenweider R A, Marchetti R,
Viviani R (eds) Marine Coastal Eutrophication. Elsevier,
Amsterdam, pp 63-106
Woodin SA, Men RA (1987) Holding on by their hooks: anchors
for worms. Evolution 41: 427-432
higher at the shallower stations (3 m) in response
to the high energy environment favouring the
trophic input to the population and most
favourable sediments texture. In the other stations, the growth rate may have been negatively
affected by hypoxic conditions during the summer period, resulting also in a higher mortality.
Acknowledgements. This work was carried out as a part of a
National Program (40% MURST). The authors thank the crew
of Daphne II for the technical support during the sampling
campaigns and the Emilia-Romagna Environmental Agency
for the physical-chemical data.
References
Albertelli G, Bedulli D, Cattaneo-Vietti R et al (1998) Trophic features of benthic communities in the Northern Adriatic Sea.
BioI Mar Medit 5(1): 136-143
Ambrogi R (1997) Tra Po e Adriatico: il sistema ecologico del
Delta Padano. In: Prospettive di ricerca in ecologia delle
acque. Quaderni IRSA 103, pp 188-208
Ambrogi R, Bedulli D, Zurlini G (1990) Spatial and temporal patterns in structure of macrobenthic assemblages: a threeyear study in the Northern Adriatic Sea in front of the Po
River Delta. PSZNI Mar Ecol 11:25-41
Ambrogi R, Fontana P, Gambi MC (1995) Population dynamics
and estimate of secondary production of Owenia jitsiformis
Delle Chiaje (Polychaeta. Oweniidae) in the coastal area of
the Po river Delta (Italy). In: Eleftheriou A et al (eds) Biology
and ecology of shallow coastal waters. Olsen & Olsen,
Fredensborg, pp 207-214
Buchanan JB (1984) Sediment analysis. In: Holme NA, McIntyre
AD (eds) Methods for the study of marine benthos. 2nd eel
Blackwell. Oxford, pp 41-65
Crisp OJ (1984) Energy flow measurements. In: Holme NA and
Mcintyre AD (eds) Methods for the study of marine benthos, 2nd eel Blackwell Sci Publ Oxford, pp 284-372
Dauvin IC, Gillet P (1991) Spatia-temporal variability in population structure of Owenia fusiformis Delle Chiaje (Anellida:
Polychaeta) from the Bay of Seine (Eastern English
Channel). I Exp Mar BioI Eco1152: 105-122
Dauvin IC, Thiebaut E (1994) Is Oweniafusiformis Delle Chlaje a
cosmopolitan species? In: Dauvin IC Laubier L Reish DJ
(eds). Actes de Ia 4eme Conference Internationale des
Polychetes. Mem Mus Natn Hist Nat 162: 383-404
Desroy N, Olivier F, Retiere C (1997) Effects of individual behavSecondary Production of Owenia fusiformis
269
iours, inter-individual interactions with adult Pectin aria
koreni and Owenia fusiformis (Annelida, Polychaeta), and
hydrodynamism on Pectinaria koreni recruitment. Bull Mar
Sci 60: 547-558
Diaz RI, Rosenberg R (1995) Marine benthic hypoxia: a review of
its ecological effects and the behavioural responses of benthic macrofauna. Oceanogr Mar BioI 33: 245-303
Fauchald K, Jumars PA (1979) The diet of the worms: a study of
Polychaete feeding guilds. Oceanogr Mar BioI Annu Rev 17:
193-284
Gambi MC (1989) Osservazioni su morfologia funzionale e comportamento trofico di Owenia fusiformis delle Chiaje
(Polychaeta, Oweniidae) in rapporto ai fattori ambientali
Oebalia 15: 145-155
Gentil F, Dauvin IC (1989) Etude allometrique de Ia Polycbete
Owenia fusiformis Delle Chlaje. J Rech Oceanogr 1: 58-60
Menard F, Gentil F, Dauvin IC (1989) Population dynamics and
secondary production of Owenia fusiformis Delle Chlaje
(Polychaeta) from the Bay of Seine (eastern English
Channel). J Exp mar BioI Ecol133: 151-167
Moodley L, Heip CHR, Middelburg IT (1998) Benthic activit in
sediments of the Northwest Adriatic Sea: sediments oxygen
consumption, macro and meiofauna dynamics. J Sea Res 40:
263-280
Montanari G, Ghetti A, Ferrari CR (1998) Eutrofizzazione delle
acque costiere dell'Emilia Romagna. Rapporto annuale
1997, Regione Emilia Romagna, Assessorato Territorio,
Programmazione e Ambiente, ARPA, 220 pp
Nilsen R, Holthe T (1985) Arctic and Scandinavian Oweniidae
(Polychaeta) with a description of Myriochele fragilis and
comments on the phylogeny of the family. Sarsia 70: 17-32
Olivier F. Dellroy N, Retiere C (1996) Habitat selection and adultrecruit interactions in Pectinaria koreni (Malmgren)
(Annelida, Polychaeta) post-larval populations - results of
flume experiments. J Sea Res 36: 217-226
Rinaldi A, Montanari G, Ghetti A, Ferrari CR. Mazziotti C (1997)
EutroflZZazione delle acque costiere dell'Emilia Romagna.
Rappotto annuale 1996. Regione Emilia Romagna,
Assessorato Territorio, Programmazione e Ambiente, ARPA,
234pp
Thiebaut E, Cabioch L, Dauvin IC, Retiere C, Genti! F (1997)
Spatiotemporal persistence of the Abra alba - Pectinaria
koreni muddy fine sand community of the eastern Bay of
Seine. J Mar BioI Ass UK 77: 1165-1185
Vollenweider RA, Rinaldi A, Montanari G (1992) Eutrophication
structure and dynamics of a marine coastal system. Results
of a ten-year monitoring along the Emilia-Romagna coast
(Northwest Adriatic Sea). In: Vollenweider R A, Marchetti R,
Viviani R (eds) Marine Coastal Eutrophication. Elsevier,
Amsterdam, pp 63-106
Woodin SA, Men RA (1987) Holding on by their hooks: anchors
for worms. Evolution 41: 427-432