Oxygen consumption by three species of lamellibranch mollusc in declining ambient oxygen tension

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [ 73 – 76 ]. In the blue mussel Mytulis edulis , for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([ 76 ], but see [ 73 , 75 ]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the sponge body which grows by the repeated addition of morphological units including individual aquiferous systems (Fig.…”

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ( [76], but see [73,75]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the Fig.…”

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [ 73 – 76 ]. In the blue mussel Mytulis edulis , for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([ 76 ], but see [ 73 , 75 ]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the sponge body which grows by the repeated addition of morphological units including individual aquiferous systems (Fig.…”

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ( [76], but see [73,75]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the Fig.…”

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

“…Our nding contrasts with previous studies on other solitary lter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([76], but see [73,75]).…”

“…Our nding contrasts with previous studies on other solitary lter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([76], but see [73,75]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the sponge body which grows by the repeated addition of morphological units including individual aquiferous systems (Fig.…”

Aerobic and anaerobic metabolism of Paraprionospio pinnata (Polychaeta: Spionidae) in central Chile

“…In addition, our observations of oxyconformity below the critical oxygen tension point (Pc=4 kPa) are in agreement with findings for other polychaetes such as Heteromastus filiformis (Pc=1.3 to 13 kPa), Terebella haplochaeta (Pc=7.3 kPa), Scoloplos armiger (Pc=7.8 kPa) and Arenicola marina (Pc=10 kPa) (Wells et al, 1980;Schöttler & Grieshaber, 1988). Bayne (1971) proposed that the relationship between oxygen consumption rates and environmental oxygen concentration can be best analysed using the dependence index, K 1 /K 2 . The oxygen dependence index for P. pinnata from 3.4 to 4.3 mg dry weight was found to be 67.1.…”

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [ 73 – 76 ]. In the blue mussel Mytulis edulis , for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([ 76 ], but see [ 73 , 75 ]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the sponge body which grows by the repeated addition of morphological units including individual aquiferous systems (Fig.…”

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ( [76], but see [73,75]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the Fig.…”

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

“…Our nding contrasts with previous studies on other solitary lter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([76], but see [73,75]).…”

“…Our nding contrasts with previous studies on other solitary lter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([76], but see [73,75]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the sponge body which grows by the repeated addition of morphological units including individual aquiferous systems (Fig.…”

Aerobic and anaerobic metabolism of Paraprionospio pinnata (Polychaeta: Spionidae) in central Chile

“…In addition, our observations of oxyconformity below the critical oxygen tension point (Pc=4 kPa) are in agreement with findings for other polychaetes such as Heteromastus filiformis (Pc=1.3 to 13 kPa), Terebella haplochaeta (Pc=7.3 kPa), Scoloplos armiger (Pc=7.8 kPa) and Arenicola marina (Pc=10 kPa) (Wells et al, 1980;Schöttler & Grieshaber, 1988). Bayne (1971) proposed that the relationship between oxygen consumption rates and environmental oxygen concentration can be best analysed using the dependence index, K 1 /K 2 . The oxygen dependence index for P. pinnata from 3.4 to 4.3 mg dry weight was found to be 67.1.…”

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [ 73 – 76 ]. In the blue mussel Mytulis edulis , for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([ 76 ], but see [ 73 , 75 ]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the sponge body which grows by the repeated addition of morphological units including individual aquiferous systems (Fig.…”

“…Our finding contrasts with previous studies on other solitary filter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ( [76], but see [73,75]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the Fig.…”

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

“…Our nding contrasts with previous studies on other solitary lter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([76], but see [73,75]).…”

“…Our nding contrasts with previous studies on other solitary lter-feeders, such as bivalves, where K m varies with the size of the animal [73][74][75][76]. In the blue mussel Mytulis edulis, for instance, the K m increases with increasing body weight, indicating a higher respiratory dependency on ambient oxygen as the specimen grows larger ([76], but see [73,75]). The lack of correlation between the K m and sponge size from the present study may emerge from the modular architecture of the sponge body which grows by the repeated addition of morphological units including individual aquiferous systems (Fig.…”

Aerobic and anaerobic metabolism of Paraprionospio pinnata (Polychaeta: Spionidae) in central Chile

“…In addition, our observations of oxyconformity below the critical oxygen tension point (Pc=4 kPa) are in agreement with findings for other polychaetes such as Heteromastus filiformis (Pc=1.3 to 13 kPa), Terebella haplochaeta (Pc=7.3 kPa), Scoloplos armiger (Pc=7.8 kPa) and Arenicola marina (Pc=10 kPa) (Wells et al, 1980;Schöttler & Grieshaber, 1988). Bayne (1971) proposed that the relationship between oxygen consumption rates and environmental oxygen concentration can be best analysed using the dependence index, K 1 /K 2 . The oxygen dependence index for P. pinnata from 3.4 to 4.3 mg dry weight was found to be 67.1.…”