Image of <i>Mercenaria mercenaria texana</i> (Dall 1902)

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Hard Clam

Mercenaria mercenaria (Linnaeus 1758)

breeding season

Egg Characteristics and Breeding Season for Woods Hole Species
mid august
URI: http://eol.org/schema/terms/midAugust

Definition: Near the middle of the eighth month of the year in the Gregorian calendar.

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(max)
Egg Characteristics and Breeding Season for Woods Hole Species
mid june
URI: http://eol.org/schema/terms/midJune

Definition: Near the middle of the sixth month of the year in the Gregorian calendar.

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(min)

cleavage stage

Egg Characteristics and Breeding Season for Woods Hole Species
unequal cleavage
URI: http://eol.org/schema/terms/unequalCleavage

Definition: In unequal cleavage, the first two cell divisions are unequal producing four cells in which one cell is bigger than the other three. This larger cell is specified as the D macromere.

Attribution: https://en.wikipedia.org/wiki/Cleavage_(embryo)

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Egg Characteristics and Breeding Season for Woods Hole Species

polar lobes
Egg Characteristics and Breeding Season for Woods Hole Species
spiral
URI: http://purl.obolibrary.org/obo/PATO_0000404

Definition: A shape quality inhering in a bearer by virtue of the bearer's being curled or wound (especially in concentric rings or spirals).

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egg coat

Egg Characteristics and Breeding Season for Woods Hole Species
none
URI: http://purl.bioontology.org/ontology/SNOMEDCT/260413007

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egg color

Egg Characteristics and Breeding Season for Woods Hole Species
white
URI: http://purl.obolibrary.org/obo/PATO_0000323

Definition: An achromatic color of maximum brightness; the color of objects that reflect nearly all light of all visible wavelengths.

Attribution: [database_cross_reference: Dictionary:http://dictionary.reference.com/]

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Egg Characteristics and Breeding Season for Woods Hole Species
opaque
URI: http://purl.obolibrary.org/obo/PATO_0000963

Definition: A optical quality inhering in a bearer by virtue of the bearer's not being clear; not transmitting or reflecting light or radiant energy.

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egg diameter

Egg Characteristics and Breeding Season for Woods Hole Species

70 µm

(min)
Egg Characteristics and Breeding Season for Woods Hole Species

73 µm

(max)

egg yolky

Egg Characteristics and Breeding Season for Woods Hole Species
yes
URI: http://eol.org/schema/terms/yes

Definition: This statement is true; the answer to this question is yes.

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rate of development

Egg Characteristics and Breeding Season for Woods Hole Species
moderate
URI: http://eol.org/schema/terms/moderateRate

Definition: Moderate rate. A rate which is neither relatively high nor low.

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stage at fertilization

Egg Characteristics and Breeding Season for Woods Hole Species
meiotic metaphase i
URI: http://purl.obolibrary.org/obo/GO_0007132

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